Tatsumi is the main protagonist of Akame Ga Kill!. A young fighter who had set out along with two childhood friends to make a name for himself and earn money for his village, Tatsumi is a kindhearted person who wants everyone to live happily, but has no problem with becoming violent if his friends or his ideals are threatened.
After learning of the corruption and evil of the Empire and witnessing the deaths of his friends, Tatsumi was invited to join Night Raid, a group of assassins that are affiliated with the Revolutionary Army currently at war with the Empire. He eventually accepts the invitation and slowly begins to accept his new life and trade, while still grieving over the loss of his friends and beginning to learn about his new ones. He used to be the owner of the Teigu Incursio until he was fused with it and became a dragon. He had sworn to use this opportunity to take down the Empire in its entirety.
He fought against the Emperor to finally bring down the corrupt empire that had caused people to suffer. At the end of the fight against Shikoutazer, Incursio's influence had increased drastically and Tatsumi was consumed. His body has become a dragon, but his mind remains.
He is, as described by the Revolutionary Army's doctor, the one who brought the end to an entire era.
Having been trained in the way of the sword and hand-to-hand combat since he was young, Tatsumi has had a fairly lean muscular physique. After training for one month while the Night Raid base was being relocated, he seems to have bulked up enough for Esdeath to notice and comment upon the change.
Upon activating his Teigu, Tatsumi is covered in armor similar to the one of which his late teacher used to wear. Tatsumi's armor is far lighter to suit his fighting style, although the long cape has not changed. After Incursio evolved to grant Tatsumi greater power the armor has now slimmed down to a more streamlined aerodynamic sporting longer horns, four eyes reminiscent to tyrant with hooked claws on its fingers and toes while finally losing the long coat and replacing it with two long black tassels with fuzzed ends dangling off them.
Due to having fused with Incursio, Tatsumi has slowly begun to take on the physical qualities of its design motif Tyrant. After its evolution, he sported a single red eye with cross slit pupil at the center, with the cowlick having disappeared entirely. After having invoked it a second time, Tatsumi has degraded further into a more draconian form. The right side of his face now sporting a more scaly reptilian appearance with a massive horn jutting out the top back of his head, with his right hand taking on similar features sporting tusk-like fingernails and segmented skin plates. Upon using it a third time, a pair of horns have sprouted from both sides of Tatsumi's head along with his hands gaining more reptilian features.
After the final evolution from Incursio's armor, Tatsumi loses all physical traits of a human. His draconian features become more defined, scales now cover his entire body, and his mouth has formed into a dragon's, sporting sharp and jagged teeth. During this final change to his appearance, even Shikoutazer's scanning system no longer recognizes Tatsumi as a 'human'.
And once Tatsumi was finally consumed by Incursio, his body changed to host Incursio's soul. Tatsumi changes into a massive dragon, becoming the size of a building. Unlike Incursio's original body, Tatsumi's form as a dragon is smaller, possesses wings, and has more red eyes. It is no longer possible to distinguish Tatsumi from a Danger Beast.
Tatsumi gives off a kind, generous, level-headed and friendly vibe. He was shown to be a bit arrogant and naive in the early chapters, when in his first appearance he believed he could be given an immediate rank of Captain in the armed forces. He displays great displeasure of killing unless provoked as shown from finding his friends tortured to death. He shows great admiration for Bulat, though he doesn't agree to Bulat's displays of affection. Overall, he displays great comradeship and great promise of being a skilled fighter. Close to the start of the manga, his affection spreads even to his enemies, giving him a liability. However, with experience, he has learned to show affection for his friends, but none to his enemies. He is capable of great rage when provoked by his enemies, making him a formidable opponent.
His personality alters slightly as he merges further with his Teigu. While donning the final evolution of Incursio's armour, Tatsumi roars at the sky and momentarily acts in a savage manner. Even Tatsumi himself states that he can sense his mind slipping, becoming something else.
And though remembering Bulat allowed Tatsumi to remain the same person until Shikoutazer's defeat, once the battle was over Tatsumi was finally consumed by Incursio and his body became its new host.
Once consumed, he took on all personality traits of Tyrant, but returned to his normal self once Akame had killed the dragon's soul. Despite now possessing a Danger Beast's body, his mind remains intact.
Using his skills in combat, he defeats the danger beast with ease. Later, he enters one of the Empire's cities, where he meets a young lady who offers him military connections in exchange for money, conning him out of all of his savings.
At the streets, he is invited by a wealthy girl named Aria to stay at her house where he learned about the state of the empire, the corrupted Prime Minister who is the core of all corruption and about the assassination organization Night Raid from one of the guards of that house while staying there.
Later, the mansion is attacked by Night Raid itself, witnessing their strength where they easily disposed of the guards. Tatsumi decides to find and protect Aria instead. Tatsumi then manages to catch up with Aria who is about to hide in her "storehouse" with Akame arriving to kill Aria and her guard, easily disposing of the latter. Tatsumi determined to protect Aria decides to fight Akame and after a struggle and almost being killed by Akame, the girl who conned Tatsumi out of his money earlier shows up, and is revealed to be a member of Night Raid herself interrupts the fight between Tatsumi and Akame stopping Akame from killing Tatsumi.The girl proceeds to reveal the true nature of the household with Tatsumi looking on in horror, shocked and disguised when he realized that Sayo were among the victims. Being at a state of mind where Tatsumi was no longer know who is right or wrong, Ieyasu who was captured as well reveals that Aria was the person who tortured Sayo to death. Aria then proceeds to reveal her true nature as she states her despise for Sayo, further disgusting Tatsumi and those around. Knowing the truth and no longer in doubt, Tatsumi stops Akame from slaying Aria as he proceeds to dispose of Aria himself out of pure anger and hatred for her actions towards his friends.
Tatsumi was then forced to see Ieyasu succumb to the Lubora disease, leaving Tatsumi devastated over the loss of his two closest friends. Leone, the Night Raid member who conned Tatsumi of his money, impressed by his potential officially invites him to join their group of assassins. Tatsumi reluctantly leaves with the group (being carried off by them), and they head back to the hideout.
Still devastated over the death of his childhood friends, Tatsumi was hesitant to accept Leone's offer to join at first. Leone shows him around the hideout and introduces him to the other members of Night Raid: Akame, Bulat, Sheele, Mine, Lubbock and then Najenda. Suspicious that they will kill him if he refuses, he asks what will become of him. Najenda assures him that they will not kill him should he refuse, but tells him that he would not be allowed to leave, and that he would be able to work for Night Raid as a laborer, earning money to send back to his village should he wish. She explains Night Raid's purpose and goals, and Tatsumi finally accepts the offer to join the Assassin's guild.He is first paired up with Akame to be trained by her and also to share her duties as well (cooking). While working with her, the two bond as they learn more about each other. Soon, he is given his first official mission to assassinate Ogre the Demon, while Leone and Akame deal with a corrupt merchant named Gamal. Tatsumi deceives Ogre and lures him into an abandoned alley, where he tells him he wants to join the Imperial Guard, but once Ogre turns his back on Tatsumi, he attacks. During the fight, Ogre threatens to kill the client who hired Night Raid, as well as the rest of her family in revenge. A very angry Tatsumi is then able to overpower Ogre and ultimately kill the corrupted Imperial. Afterwards, he states that he didn't take any wounds at all. Upon returning to the hideout, Akame promptly strips him to see if he was lying to save his pride, and is greatly relieved when she found that he was not lying, explaining that she has lost many friends from poison because they didn't report their wounds.
He is next put under Mine who pulls rank over him the whole time that he is paired with her. He learns more about the Empire and the other Night Raid members and begins to form a friendship with her, although she still often teases him. He remains paired with her when they go on their next mission: to kill a relative of the Prime Minister; Iokal. While Mine kills Iokal with one shot the remaining members of Night Raid are left to deal with his bodyguards. Tatsumi and Mine retreat as her job is done and Tatsumi is not strong enough to face the bodyguards. While leaving he learns why Mine fights against the Empire. One of the Guards, however, escapes and attacks Mine, and Tatsumi latches on to the attacker, telling Mine to take the shot (at close range). When she starts to object, he tells her he has faith in her. Mine kills the attacker, and is about to accept Tatsumi before he hits her on the forehead, complaining that she nearly killed him as well. The two return to the hideout, having grown a bit closer after this experience.
Tatsumi is then paired with Akame and ordered to recover a Teigu from the serial killer Zanku The Beheader. He learns from Akame about the weapon relics known as "Teigu". He is then tricked by Zanku who creates an illusion of Sayo to lure Tatsumi to him, and he is separated from Akame in the process. While Tatsumi holds his ground against Zanku, the serial killer uses his Teigu Spectator to give him the upper hand, and he proves too much for Tatsumi, Akame however, arrives just in time to save Tatsumi, and defeats Zanku with her superior speed and will. The pair return with the Teigu to the hideout. Still unable to accept the death of his friends, Tatsumi is found at his friends' grave site by Akame, who tells him to help her get dinner ready.He then is placed under Sheele, who at first disliked him, but is unable to recall why. She trains him by making him swim in heavy armor. He learns why she fights against the Empire and why she is in charge of training (he enjoys the last reason). Later at a Night Raid meeting, Najenda had him try on Spectator, and the Teigu rejects him as a user, but not before Tatsumi uses its special ability to see Sheele, Mine, and Akame in their underwear. He asks if there are Teigu that can bring the dead back to life and is deeply hurt when the other Night Raid members tell him that there is no such Teigu. Sheele notices that there is deeper reasoning to this and finds him at the graves of his friends, trying to hold back tears, stating that he had hoped that there was a Teigu able to bring the dead back. She hugs him and tells him that it is okay to cry. Sheele comforts him, holding him in her arms. He thanked her for her kindness, and from that point, the two became closer. He is finally able to let go of his friends and accepts their deaths.
Next, Tatsumi is placed with Leone and sent with her to the Capital to complete a mission. He learns that she is very popular in her home district. The two are separated when a gang of men she had swindled out of money come after her. He then meets Seryu, who helps him find the bar he was ordered to find, and reunites with Leone there. They enter the targeted building and witness a gang kill a drugged prostitute, a girl that Leone knew from the streets. Together, they eliminate all the gangsters in the building. When he asks Leone what will happen to the girls, she replies that it isn't their problem, but then tells him that she knows a doctor who will look after the wounded girls if she asks him to. Tatsumi notes her kindness with a smile and she "marks him" as hers. Tatsumi wonders how the other team (Sheele and Mine) are doing.
Mine returns to the hideout, sharing the bad news of Sheele's demise at the hands of Seryu Ubiquitous. Tatsumi and the rest of Night Raid are devastated and enraged. Tatsumi begins to leave to get revenge on Seryu, but is stopped by Bulat, who tells him to stop acting childish. He is told to help Akame with cooking dinner while Mine recovers. Still in distress himself, Tatsumi wonders how Akame can stay calm and collected when one of their comrades has been killed.
Tatsumi is sent with Leone to kill the Kobores Brothers under orders from the Revolutionary Army HQ. The two complete their mission, slaughtering them, and as they are leaving, Tatsumi hears a child's voice calling for his father, who was a child to one of the brothers. Angry at himself, Tatsumi leaves quickly. The next morning, Tatsumi attempts to clean the bloodstain from his sword while thinking about how the boy only saw the Kobores brother as a good father, instead of the villain he actually was. Leone shows up and tells him that he could scrub the sword for his entire life, but the stain of blood would never fade. While she tries to cheer him up, he asks where she got her Teigu and why she fights the Empire. While he finds that her reasons give him strength, he is still troubled. Later that night as he goes to eat, he witnesses Akame preparing Sheele's favorite food to offer to her grave, and Tatsumi tells her that he admires the way she can remain so unaffected, and that losing a friend is something that he will have to get used to like her. Akame grabs Tatsumi, and tearfully tells him that she will never get used to losing her friends. Tatsumi realizes that she was just as affected as he was, and swears to her that he will never put her through the pain of losing him.
He begins training with Akame with a new determination, unwilling to stop until he becomes strong enough to live up to his promise with her. He is interrupted by Bulat, who offers to train Tatsumi so he can become stronger, Tatsumi accepts and goes with Bulat to Mt. Fake, where he and Bulat fight against tree beasts as part of his training. The two bond as they put their lives on the line battling the danger beasts of the mountain. When the two return to the hideout, Night Raid has a meeting to discuss the Prime Minister, who has begun to order his political enemies to be killed, simultaneously using Night Raid as a scapegoat and blaming them for the assassinations. Najenda also notes that Esdeath has returned to the Capital, having finished with her campaign against the Northern Tribes. Lastly, Najenda notes that she has lost contact with the Night Raid away team, and worries that they have been wiped out. Bulat and Tatsumi are then assigned the task of protecting another of the Prime Minister's political enemies, who is aboard the cruise ship, "Ryuusen".
Tatsumi and Bulat arrive at the luxury liner and board, Bulat uses Incursio's stealth ability to scout out the area for potential attackers. The Three Beasts arrive at the same time and begin to search for their target. Tatsumi learns of Bulat's past, and the reason why he fights the Empire. Bulat then must retreat to the interior of the ship as the time limit on Incursio's stealth ability had been reached. Bulat then leaves for the interior of the ship, leaving Tatsumi in charge of watching for the assassins. While he is gone, Tatsumi is weakened by the Teigu Scream's music, and the crew and most of the guests are put to sleep. Tatsumi is attacked by Daidara, whose Teigu gives him a major advantage, but Tatsumi is able to hold his own until Bulat shows up. Bulat tells Tatsumi to watch his battle closely and memorize his movements, as the other members of the Three Beasts arrive. Bulat evades their attacks, leaping high into the air, knocking out Nyau, and quickly uses Neuntote to cut Daidara in half, killing him instantly. He then begins to fight with Liver, his former superior from his days with the Empire. Still able to fight, Nyau attempts to play Scream to give Liver an advantage, but is stopped by Tatsumi. While Bulat fights Liver, Tatsumi keeps Nyau from interfering, but is unable to keep him occupied for the whole fight and Nyau defeats him, stopping Bulat from landing the killing blow on Liver. While Bulat ends up defeating Liver, he is poisoned and wounded. Tatsumi grabs Bulat and attempts to escape with him, but is stopped by Nyau who uses his trump card, growing to full adult size. Bulat entrusts Tatsumi with his sword, saying that it is Incursio's key and to use it. Tatsumi's will is so strong that the Teigu's core evolves to match him. With this new power, Tatsumi kills Nyau in one punch. Bulat succumbs due to his wounds and the deadly poison that Liver used in their fight. Tatsumi sobs as his friend and mentor passed away before him. He then takes the rest of the Teigu along with him back to the Night Raid hideout.
Some time after this event, Mines injuries were completely healed, and she immediately began to train in order to become stronger and avenge Sheele. She finds both Akame and Leone helping Tatsumi and Lubbock train, sitting on their backs as they do pushups. Tatsumi tells her that he is training so he can use Incursio more effectively, and to be able to use its stealth ability for a longer period of time. Lubbock adds that he and Tatsumi are now the only men left in Night Raid, so he should better start getting serious. Najenda arrives to tell everyone that she is leaving for The Revolutionary Army HQ, in order to hand over the Teigu that Tatsumi gathered. Before leaving, she places Akame in charge, and offers Tatsumi some words of comfort, telling him that he is strong. Leone tells Tatsumi that Bulat had faith in Tatsumi's abilities, and was sure that he would someday become extremely powerful, surpassing even his former mentor.
Tatsumi heads to the capital hide-out, which is disguised as a bookstore owned by Lubbock. The two head down the stairway to the secret room to find an intoxicated Leone already there. Lubbock informs him that Mine's face has been put up on wanted posters, meaning that they are now the only ones left who can walk through the streets of the capital by day. Tatsumi asks about the new police group formed called the "Jaegers", and their leader Esdeath. Lubbock tells him that a few years ago there was a group of savage tribes in the south-west of the Empire that rose up in rebellion. Many thought that the Empire would win due to the fact that the tribe only had 10,000 soldiers while the Emperial military sent 120,000. However, the environment proved the tribes' greatest weapon, as the outskirts of the Empire were a harsh environment, and the soldiers were born near the capital, with no experience of such unforgiving terrain. When all seemed lost, the Empire sent General Najenda and Esdeath to reinforce the army. Esdeath froze a lake that had effectively cut off the army from the tribes' main village, and using the frozen surface as a bridge, the forces crossed over and defeated the tribe. Esdeath then took the captured leaders, and forced them to watch while she had her forces perform mass rape and murder of the tribes civilians, to discourage rebellion in the future. Tatsumi however, was confused by this, and stated that the incident would only create future rebellion, Lubbock tells him that future rebellion is exactly what Esdeath wanted.
Lubbock tells Tatsumi that the Empire is holding a tournament, in which the winner will obtain a large cash reward, and that he should enter so he can send the money back to his home village. Esdeath oversees the Tournament personally, which the Empire had staged in order to find a new user for the Teigu Extase. Tatsumi enters the Tournament under the guise of a blacksmith from the countryside, and wins the tournament, showing his great skill, fearlessness and confident smile, unknowingly fulfilling all of Esdeath's requirements and capturing her heart.
Esdeath herself came down to meet Tatsumi and give him his reward. She places a collar around his neck to the shock of everyone present, and drags him off (before knocking him out) to the Jaegers' headquarters.
At Jaegers' headquarters, Esdeath informs the rest of the group that Tatsumi will be a new member and her partner in love. Wave and Run however question why he is chained and wearing a collar, to which she replies that it is to show people that he is her lover, Esdeath is then convinced to take the collar off, and Tatsumi tells her that he has no interest in working for the Empire. Esdeath, however, shrugs this off and tells him that she will make him obedient in time. Seryu then interrupts, telling them that it is a lot to take in, and Tatsumi feels a flash of anger, but holds his emotions in line to not blow his cover. A messenger arrives to tell Esdeath that they have located the hideout of a group of Bandits.
While the rest of Jaeger attack the bandit camp, Esdeath and Tatsumi watch from a nearby cliff, Tatsumi thinks of escape, but Esdeath holds his hand, making it impossible. After the fight concludes, she tells him that he will sleep with her in her room. Tatsumi decides he will try to persuade Esdeath to side with him and the Revolutionary Army, however, this fails as she insists on serving The Empire. Esdeath sternly retorts that it is she who will change and control him and not vice versa and uses him as a human pillow for the rest of the night, making him so nervous that he couldn't sleep.In the morning, Wave notes that he must have had a rough night, and Tatsumi tells him that he was so nervous that he couldn't rest. He notices Kurome eating her candy, and is reminded of Akame. He tells her of how she looks similar to the girl on the wanted posters. She explains that the two are sisters and vows that she will kill her. Tatsumi, Esdeath, Wave, and Kurome then head to Mt. Fake to hunt Danger Beasts, and Wave and Tatsumi are paired up. While walking along a mountain path, Tatsumi silently remembers the times he spent with Bulat on this very mountain. Wave tells Tatsumi that they seem to have a lot in common, and seem to deal with the same type of comrades. The two then encounter a group of several tree beasts and begin to fight them. Using the confusion of battle, Tatsumi manages to activate Incursio and slips away. After dispatching the last of the Tree Beasts, Wave notices Tatsumi's absence, and fearfully imagines the punishment in store for him if Esdeath finds out he let Tatsumi escape. Wave activates Grand Chariot and begins to search for Tatsumi. The two encounter each other, but are both unable to recognize the other due to their armor Teigu. Wave recognizes Incursio as a Teigu in the possession of Night Raid, and attacks. Tatsumi is unwilling to fight Wave, and instead focuses on attempting to escape. Wave taunts Tatsumi, telling him that he's heard of Night Raid, and that they are villains who murder innocent people, which Tatsumi angrily denies. Wave attacks Tatsumi, sending him flying into a river. Tatsumi uses this chance to activate Incursio's stealth ability, fooling Wave into thinking that he was floating downriver to escape, while he was actually on the river's bank. Tatsumi encounters a danger beast but is too wounded to fight back, but he is saved by Akame who tells him she waited at the cities' main gates and followed him secretly after he left, the two become close, but are interrupted by Lubbock, who notes that his death wouldn't have been so bad as he would have been the only man left. Akame, however, notifies Tatsumi that he was actually very worried.
Tatsumi later reports everything he has learned about the Jaegers. He tells the rest of Night Raid that the Jaegers match them skill for skill and as such numbered them as they are. He is also very worried about Esdeath as she is very powerful, with the element of surprise with her as well as the fact that they have no idea of the limitations of her power. Akame however, reassures everyone that they will kill her. With this, the Night Raid celebrate his return.
Unknown to Tatsumi however, Dr. Stylish had tracked him back to the Night Raid hideout.
Dr. Styish uses his own personal army Team Stylish to attack the Night Raid Hide-Out. During this attack Tatsumi busts out and attack the infantry head on, decimating it in the process, and he notes that the soldiers he is fighting belong to Doctor Stylish and that he must be working alone, then encounters Kaku. Upon seeing that he has Sheele's Teigu, Extase, he becomes deeply angered and instead of fighting Kaku he attempts to retrieve the Teigu becoming injured as a result of him doing so. Mine arrives and kills Kaku, finally bring Sheele's Teigu back to where it belongs.
He is joined by an injured and furious Leone who saves Mine and kills Trooma. Najenda soon arrives and the rest of Night Raid escape from the Headquarters, but they're however, affected by a poisonous gas that renders them immobile with only Tatsumi being able to fight. Just as everyone is in trouble, Susanoo comes in to help everyone out. After Stylish injects himself with a drug that transforms him into a Danger Beast, he helps Akame to get close to Stylish on the Danger Beast's head where she kills him. He stands with the rest of Night Raid as Stylish lays dead on the ground.
Tatsumi and the rest of Night Raid relocated from their base to an unexplored area of the empire filled with danger beasts to keep low from the eyes of the Jaegers. Tatsumi participates in a danger beast hunt with Leone who comments about how strong Tatsumi has become due to becoming able to summon Incursio's auxiliary spear.
Upon their return to the capital they receive reports of a new kind of danger beast. Although they admit that in some way this is helping the empire, Tatsumi declares that above all they fight for the people so he would like to destroy the danger beasts as soon as possible.
On a patrol with Lubbock, Tatsumi decides that it would be better to survey the area on top of a nearby mountain. Once there he is nearly attacked by Esdeath who is flying overhead, she stops her attack but the two of them are attacked by several of the new danger beasts (which by then where revealed to be modified humans made by Dr. Stylish). Esdeath makes quick work of them. Esdeath comments on how it must be fate for them to meet again. The two of them are attacked by a hooded enemy who uses his Teigu to teleport them.
They arrive in an inhabited island. Tatsumi believes that they are under an illusion and asks Esdeath to hurt him to show whether it is an illusion or not. She responds by kissing him and disproves the fact that they are under an illusion. Esdeath creates an ice pillar to attain a higher vantage point to see. They are attacked by two colossal danger beast (similar to Dr. Stylish's danger beast form). Tatsumi kills one by using an ice pillar that Esdeath creates to jump on to the area near the weak point of the danger beast. Esdeath kills the other one by crushing it with a massive ice hammer.
Esdeath determines that they are on an island southeast of the empire. They decide that there is no use panicking and make preparations to stay on the island. By the end of the day Esdeath mentions and finds a mark in the sand related to the power that sent them here. Deducing that it must open again at some point they wait for it to open.
Waiting for the mark to allow them back to the empire, Tatsumi tells Esdeath about how he learned both his swordsmanship and blacksmithing skills from a retired soldier that lived in his village. In turn, for his story Esdeath tells Tatsumi about how she was the sole survivor of a danger beast hunting clan and how after she became bored with danger beasts she joined the army, becoming a general and consuming the ice demon's blood Teigu to give her ice manipulation powers. Tatsumi realizes that it is folly to try to recruit her to the revolutionary army due to her original sadistic ego.
At this point Esdeath reveals her intention to find a danger beast to be able to ride on. Tatsumi spots one and while Esdeath is distracted with catching the beast the portal opens again. Tatsumi enters the portal, but not before he tells Esdeath about it. On the other side he seemingly disappears using Incursio's invisibility skill. He mentions that they will meet again but as enemies.
Tatsumi and the rest of Night Raid are told by Najenda that the revolutionary army will make its move in a multi-direction attack on the Empire. Night Raid receives an order to kill Bolic, a key member of the religious group Path of Peace due to his involvement as a spy for the empire which threatens to suppress an uprising by the Path of Peace followers, which is to become one of the attacks of the revolutionary army.
Knowing that the Jaegers will continue to chase them as they head for Kyocroch they decide to spread misinformation that they are headed in two different directions. They successfully manage to split the Jaegers into two halves with Bols, Kurome and Wave in one and Esdeath, Run and Seryu in the other.
Tatsumi and all of Night Raid ambush Kurome's group. Due to a surprise attack they manage to send Wave flying from the battlefield. Kurome however, summons her eight corpse dolls to engage against Night Raid including the super high class danger beast Destaghoul.As they engage the enemy each member of Night Raid is forced to split up to deal with the corpse dolls. Tatsumi is forced to defeat Apeman who is backed up by Hentarr, once a survivor from the Ban tribes. He decides that fighting the two of them is unfavorable and manages to split them up whilst Chelsea destroys Hentar. She leaves Tatsumi to destroy apeman and he succeeds in knocking Apeman up the rockface to the place where Kurome resides. In a flurry of devastating punches and a final blow to the head Apeman's head is crushed and Apeman is left incapacitated.
Tatsumi prepares to fight Natala, but several interruptions including interference from Susanoo stops the fight. At this point a self-destruct explosion occurs from Bor's Rubicante, forcing Kurome to retreat and the battle ends, but not before Chelsea kills Bols while in disguise.
Tatsumi groups with the rest of Night Raid and is astounded when he learns that Leone's arm can be re-attached (it was cut off by Kurome in the previous battle). He is told that Chelsea went after Kurome and he chases her to the nearest town only to find that Chelsea had been killed and her head was on top of a pole in the town.
That night he dreams of the fallen Night Raid members; Sheele, Bulat and Chelsea. He expresses regret that he wasn't able to spend more time with them, but resolves himself the next day to continue his mission.
Night Raid arrive in Kyocroch. They set out surveying the area as they know that it will not be easy to kill Bolic due to the Jaegers interference. They are also staked out by members of the Rakasha Demons. Whilst on a mission with Mine, Tatsumi is attacked by Seryu of the Jaegers and a member of the Rakasha Demons. They split up with Tatsumi handling the Rakasha demon and leaving Mine to handle Seryu.
Tatsumi moves the fight to a nearby ruin. Unable to connect a clean hit on the Rakasha demon Tatsumi decides to bring down the entire ruin on his assailant. He leaves the rubble unharmed and his assailant is unable to continue the fight with Tatsumi.
Tatsumi rushes to Mine's aid, saving her from the self-destruct bomb planted in Seryu's head should she ever be about to be killed. He declares that he was too weak to save Bulat, too late to save Chelsea, but just in time to save Mine.
After several weeks of rest and preparation, Night Raid decide to assassinate Bolic. Night Raid is to split into two groups. One consisting of Akame, Mine and Lubbock and the other with Najenda, Tatsumi, Leone, and Susanoo. The former group is charged with sneaking with an air manta and striking from behind whilst the latter group is to serve as a distraction for Esdeath and the Jaegers.
The distraction group find Bolic, Esdeath and Kurome in a cathedral-like area. They find that the other group have yet to come as planned. They begin to fight Esdeath whilst Tatsumi uses Incursio's ability to go invisible in order to find an opportunity to kill Bolic in the fighting.
However, Esdeath quickly defeats the members of Night Raid and begins to torture Leone. Unable to handle the torture of his friends Tatsumi goes out of his invisible state and strikes at Esdeath but is quickly defeated.
At this point, Najenda is forced to use Susanoo's trump card a second time in order to kill Bolic quickly. With his increased abilities he gets close to killing him, but at the last moment, Esdeath uses her trump card to freeze time and stop Susanoo, dicing him to pieces.
Esdeath is curious as to who is underneath Incursio's armor attempts to remove it however, it is at this time where the other group arrives and is able to strike Bolic. Tatsumi forces himself to hold back Esdeath for a moment, which is just enough time for Akame to kill Bolic. Night Raid is forced to flee and Najenda is forced to use Susanoo's trump card a third time to hold back Esdeath. Night Raid flee with their mission complete, but at a cost of Susanoo who dies holding back Esdeath.
As the revolution begins, Night Raid takes a less direct route to their base in order to fool pursuers and to heal from injuries sustained in the previous mission. Mine and Tatsumi are sent off to collect food for Night Raid as they camp. Mine, whose feelings have grown for Tatsumi attempts to confess to him, but he misunderstands. Mine is forced to kiss him to get him to realize her feelings toward him. They agree to go out together and declare their relationship to the rest of Night Raid.In the capital a new group sent to aid security in the capital; Wild Hunt puts the capital in the grip of fear and terror. After, several requests from the public and in addition orders from the Revolutionary Army, Night Raid sets out exterminate them.
When we next see Night Raid, they interfere in a battle between the Jaeger members Run and Kurome and the two members of Wild Hunt; Cosmina and Enshin. Tatsumi using his spear slams into the ground sending large amounts of rock at Enshin which distracts Enshin enough to catch him off guard to Akame's attack leaving him dead. As the other member of Wild Hunt Cosmina is also dead, Night Raid turn to fight Kurome and Run. However, with the last of his strength Run attacks them, whose attack is blocked by Tatsumi. The Jaegers flee the scene.
Some time later, Tatsumi and Lubbock get caught in a trap by Syura who teleports them in the palace. Despite the disadvantageous situation, Tatsumi attempts to control the situation with the priority to flee. He tactically runs to an empty area, using his trump card of invisibility, he deals a damaging kick to Syura, Dorothea and Suzuka and then produces a smokescreen to avoid Izou. However, as he leaps to get away, he is stopped by Esdeath and Budo leading to their capture.
Tatsumi wakes up in a prison cell, greeted by Suzuka and Dorothea who aim to make him their play thing and disgrace him. Dorothea claims that she didn't have any sexual desires until she bit him earlier. Esdeath then enters and angered by this scene, she slams Suzuka's face to the wall and threatens the two to never lay a finger on him. Tatsumi, is then embraced by Esdeath, but only to be displeased. He states that he will never join her and announces that he is in love and in a relationship already, much to her surprise.
Still clutching on his resolve, Tatsumi rejects to eat food made by Esdeath and the offer to become her subordinate or risk public execution. Once he hears about Lubbock being dead, the persuasion is futile and he is willing to die rather than being a traitor to Night Raid.
With the dawn of day of the execution approaching, Esdeath is unable to convince him and become hers, she then comes to the conclusion; if Tatsumi will never be hers, she will at least deliver his death instead to prevent anyone else touching him.On the day of the execution, Tatsumi was tied to a cross with his executors, Esdeath and Budo, and questioning Budo on his view on the current Empire. Esdeath prepares to impale Tatsumi, stating her understanding of the human body, and telling Tatsumi to try and survive as long as possible (though she never intended to kill him, just leave him in a near-death state). Seeing how the crowd seemed to enjoy how Tatsumi was about to be killed, Tatsumi accepted his death, but vowed that he wouldn't give them any satisfaction from it, but simply smile and laugh, to show Night Raid's pride. Before Esdeath managed to pierce Tatsumi, the execution was crashed by Mine who arrive to save Tatsumi, much to Tatsumi's horror, though he was touched by how far Mine was willing to go for him, something that Esdeath noticed. After, successfully blasting Budo away from the Colosseum and holding her own against Esdeath's attacks, Tatsumi was amazed by how Mine showed that, despite the overwhelming odds, Mine showed no intention of dying, but rather getting Tatsumi out of there successfully. While fighting Esdeath, Mine used her "Genius" sniping skills to free Tatsumi, though grazed his sleeve a bit, which Tatsumi noted that Mine still did it too close for comfort. Going immediately for Incursio, he grasped the hilt, but pulled back in pain as he noticed some small barbed wiring around Incurio's hilt. Hearing Esdeath tells him to come at her and show her how strong he was, Tatsumi prepares to don Insursio. Remembering Lubbock's death and determined to prevent that from happening to Mine, Tatsumi speaks to Incursio as he dons the armor, demanding more power from the Teigu to destroy the injustice of the empire, leading to another evolution of the Incursio, regardless of how painful it might be for him.
As Tatsumi emerges in his evolved Incursio form, he immediately charged at Esdeath to attack, and unlike before at the Cathedral, had managed to fight more evenly with her, something that Esdeath noted with joy, as they were finally connecting for the first time. Tatsumi stated that Esdeath cannot be as lax now.
With Tatsumi's new power, coupled with Mine's support, forced Esdeath to use Mahapadma to prevent herself from being struck. However, much to her surprise, Tatsumi had managed to resist the technique thanks to Incursio having evolved to resist the cold, overcoming her Trump Card for a moment. The battle against Esdeath continues with Akame and Leone joining the fray. Soon, Budo reemerges undamaged, despite the powerful blast from Pumpkin he received, and pissed off at Night Raid for disrupting the peace of the Capital.
After telling Akame and Leone about Lubbock's death, he and the others prepared to face both Budo and Esdeath. While facing them, Tatsumi noted the extreme pain he was feeling, as if his body was being ripped to shreds. However, Tatsumi moved to block Budo's lightning attacks, and noted that this was the time to push his body beyond its limits. After blocking Budo's attack, Tatsumi and Leone teamed up to fight Budo, further angering the Great General, and summoned lightning from the sky that struck them both, rendering them immobile. However, Tatsumi had quickly recovered, as Incursio had evolved to even resist lightning attacks, and began to fight Budo on his own. During their fight, Tatsumi said in his mind towards Budo that he once strove to be at the top of the ranks, and now that was what he was battling against, with his body and soul.Shocking Budo by how Tatsumi was able to be able to fight on par with him, as despite his potential, Tatsumi's power up seemed almost instant, leading Budo to deduce the possibility of Incursio fusing with Tatsumi. Attempting to finish him off, Budo summoned another lightning-bolt to strike Tatsumi, but this time Tatsumi saw it coming, telling Budo that he was told to always be aware of his surroundings, thinking of Bulat, who gave him that advice. Tatsumi then struck a powerful slash across Budo's back, injuring him greatly and making him collapse, before he got back up, and his lightning growing wilder due to Budo's anger.
Esdeath, who had been fighting both Akame and Mine at the time, intervened and battled Tatsumi, stating to Budo that Tatsumi was meant to be executed by her.As Budo unleashes his technique, "Advent of the Thunder Emperor," Tatsumi looks at his comrades with worry, before Esdeath attacked, reminding him that his enemy not the lightning, but the ice, and told Tatsumi to give it everything he had. Though they fought fiercely, Esdeath commented that he still had yet to truly reach her and she attempted to capture him in ice, though Tatsumi dodged, much to her surprise. As Tatsumi was stated by Esdeath to be growing stronger even while battling, Tatsumi moved into to strike Esdeath from above. Tatsumi knew that, despite Esdeath telling him to give it everything he had, she was showing so much enjoyment, something he would exploit to give him an opening.
When Esdeath blocked his attack, Tatsumi let go of his weapon, and moved into to deliver a powerful punch, which was strong enough to break through her ice armor, and strike her, knocking her away, though Tatsumi was surprised that he managed to actually do it.
As Najenda arrived at the scene for their escape, Budo attempted to attack her, but Tatsumi blocked it, saying that if he let Najenda get hurt, he'd never be able to face Lubo again, tipping Najenda about Lubo's fate.When asked by Akame about Esdeath, he replied that he managed to strike a blow, which will buy them enough time to escape from her stunning Akame. Telling them to get on the Danger Beast, Tatsumi allowed himself to be the shield and blocked more of Budo's attacks with his resistant armored body, though Budo knocked him away. As Budo overwhelmed Akame, Leone, and even blocked Mine's attack, due to Pumpkin being pushed too far. As Budo stated that there was no escape for them, Tatsumi got up and declared that they'd all get out of here alive. Budo noted that Tatsumi showed the same expression as "that brat", which Tatsumi realized was Lubo, meaning that Lubo hadn't given up to his last breath, making Tatsumi determined not to give up either.
As Tatsumi and Budo prepared to attack, Mine declared that she'd use her Trump Card, a bluff meant to catch Budo off guard for a moment, which worked, and allowed Tatsumi to deliver a devastating punch to Budo, sending him flying back.
Getting Akame, Tatsumi headed for the Danger Beast to escape, but he soon collapsed, as the poison that he had been given from the barbed wiring on Incursio's hilt had taken effect. While the poison was capable of killing a High Class Danger Beast instantly, Tatsumi having donned Incursio almost immediately, had managed to cut the effects to a certain extent, though even that had reached its limit from the intense fighting. Tatsumi lost his consciousness from that, where Mine soon sacrificed herself to save them and kill Budo, using all her power that rendered her comatose, and Pumpkin destroyed.Staying by her bedside, he told her about how she had managed to help them succeed in making the revolution nearing success. He told her to rest for now and leave the fighting to him, which he'd take her share in her place.
As Mine was later being taken away and cared until she wakes up, Tatsumi held her hand and told her that when the time came, he wanted to marry her while declaring that he loved her.
When Najenda asked how his body was, Tatsumi stated that he felt power welling up inside him, and recalled how he was examined by a doctor that was able to use the Perfector Teigu, and learned that Incursio had bonded with him, and thus he was becoming Incurio's dragon armor, though warned that this was not a power-up at all, but rather it would break him, though unlike a poison, Tatsumi was gradually becoming stronger. Unlike Bulat, who had used Incursio in a proper way, Tatsumi had forced an evolution before he was ready for it. When the doctor mentioned the story of how Incursio couldn't have fought the two strongest in the Empire, Tatsumi stated that he could endure any pain as long as he could have power, and this was the cost, as he will grow stronger, but will die soon, probably 10 years or even less. He did note that if Tatsumi continued to train and build up strength, he might be able to use Incursio without overdoing it, but if Tatsumi continued to use Incursio as he was now, he would be devoured by Incursio and die from it, and pointed out how the symptoms already appeared in Tatsumi's right eye. Finally, the doctor stated that Tatsumi had 3-4 more times was Tatsumi's limit.
Tatsumi remained determined to keep fighting, and although Najenda wanted to remove Tatsumi from further combat, she couldn't, as they had no idea what Esdeath's trump card would be now, and they needed Incursio, who had adapted to her frozen atmosphere. Najenda and Tatsumi spoke about the Revolution Army's progress, and how they couldn't afford to lower their guard, as they were sure that the Prime Minister had an ace up his sleeve, added with Esdeath's unparalleled strength. Noting how Esdeath would be fighting with full enjoyment, Tatsumi stated that for as long as he knew her, he hid his identity from her, and that Esdeath was persistent in trying to take Tatsumi, but had a feeling that Esdeath won't hold back on Tatsumi anymore. He declared he would fight with all his might to defeat her, and added that he would fight Lubbock's part as well, though Najenda told him to not beat himself over it, as Night Raid was all for one, and one for all.
After a briefing with Najenda with the revolutions armed forces, Tatsumi along with the rest of Night Raid set out to deal with the remnants of the Wild Hunt. Who've last been spotted raiding various Revolution Army Bases with the newly recreated cosmina, just as the Drothea and the others were prepping to raid another base to feed her pet creation. Akame and the rest of Night Raid swooped in; the former dealing what seemed to be a deathblow to the homunculus. But as she rises back up again after having sheded her philosopher stone, Tastumi stands firm as she takes on the monstrosity, remembering that he could only use his Teigu four more times before Tyrant consumed him but shook off his insecurity when thinking of Mine and charged at the enemy fearlessly.After Dorthea had finished dispatching Leone Cosmina had come crashing in just as she was contemplating how she was doing against him. After, loping off her a limb and landing some critical blows against the creature she protrudes a slew of tendrils to attack him, after blocking most of the barrage a hidden coil springs up from the ground jabbing through incursio's shin guard. As poison is funneled into his body he reveals his immunity to said toxins by tackling Cosmina with as much ferocity as ever, the alchemist suspecting that Tatsumi's merging with his Teigu enabling him resilience against contaminants after having adapted to survive the prime ministers cowardly ploy during his execution.
As Leone and Akame finish up with their respective opponents Tatsumi deals the killing blow against the mutated Cosmina causing her creator to feign collapse at the crumbling of her ambitions, only to be crushed flat under a rock by Leone soon after. After having completed their mission Leon and Akame stand outside of Tatsumi's room only to find he's not in.
Meanwhile outside Night Raid's base Tatsumi sits alone in a cave groaning and agonizing in isolation due to his second use of the evolved incursio. After Leone and Akame find him through tracking his scent only to find that half of his face has transformed to reflect tyrants own visage, not wanting to concern the others over his pains Tatsumi tried his best to conceal his problems only for the two to gently embrace him reassuring that they'll help him through his turmoil.Back at the base Tatsumi shows more control over his transformations now being able to revert back to a more human appearance at will, when the commander comes in to debrief Akame on a new mission she also recommends He and Leone take a breather. After Akame had successfully completed her hit list assignment and was told that Tatsumi was resting up after feelings of exhaustion rose up in him.
After the Empire Assassination squads have been dealt with Tatsumi and what remains of Night Raid sit down and enjoy a bite too eat. The former of which laments not being of much use seeing as the rest of the crew are busting their butts doing all the heavy work while he's stuck in the benches, the rest however comment that he's not to engage in any combat until the apex of the war Najenda promising to work him but good when the time comes, Leone following sweet by glomping onto him soon after. Noting a somber Akame leaving the dinner table Tatsumi notes her unusual quietness but both ladies are unsurprised seeing as she'll be dealing with her little sister soon.
As was per the agreement when Akame initially joined up with the Revolutionary Army, Tatsumi learns that in order to serve under them that she be given leeway on approach regarding her wayward sibling and that when the time had come that she; Akame herself and no one else would interfere with her settling things with her, Leone affirms her desire to help her comrade meet her own goals if and when it comes to that with Najenda going onto say that in the even Kurome is spared and the revolution being over by then. That the army whom originally marked her for termination will cease all hostilities towards her and permit Akame to watch over her, and that the elder of the two had been working rather diligently for so long in order too have these requests met. Having long come to terms with Akame's designs and fully considering the possibilities of Kurome rejecting her proposal leading the two to fight it out to the death; without getting either sides of the conflict involved in order to make it between just the two of them, Tatsumi professes he shares the same mindset as Leone in supporting whatever decision Akame comes too in the end; Najenda noting Tatsumi's more calm demeanor compared to way back when.
As Akame sits outside under an oak tree looking up at the starless sky Tatsumi comes up to her wondering if she should be asleep by now or not. His hostess admits she's too restless at the moment, Tatsumi states that he's coming with her to oversee the battle between sisters and while Akame rebukes this stating that this is between family he retorts that because she's his friend and that this is her problem he will come as an impartial observer.
Neither as a member of Night Raid nor an emissary of the Rebel Army, just standing guard as to keep anyone from interfering with they're business. Akame notes that they're boss said he shouldn't be fighting now until the apex of the war itself, but he states that while she's only worried about his state of being from when last he equipped Incursio that he'd happily give up another usage if it's for a comrade in arms stating he can only use it four more times before he's done in by it. Stating he was shocked that they left him behind the last time when the call to arms was sounded and that this was his way of making amends for his inaction, also mentioning he has no intention of dying seeing as he has to go back to Mine assuming they win the war but could not stand living with himself if something were to happen to a friend while he was resting up for the battle ahead when he could have been there for them.Akame thanks him for his kindness and determination sharing with him that her Teigu Murasame has a hidden trump card that she's unable to use due to it requiring she cast aside her humanity and become a vicious man-slaying demon. Asking him as his friend that if she should succumb to the demon within using this hidden aspect of her weapon, that Night Raid would end her on the spot stating it would be an honor to have him end her before she becomes a ravenous butcher. Impressed by this statement Tatsumi goes onto request from Akame; that should Incursio consumes him and he becomes Tyrant's new body that she would be there to put him down as well. Saying that for him it too would be an honor to die at the hands of a comrade.
Knowing full well what that means, Tatsumi states his past self would denote such a request as cowardly feeling that Akame would say you have Mine to go back too plus the fact that he promised her he would survive till the end of it all. But Tatsumi cuff's such understanding by stating Akame is selfishly asking her dear friend to end her should she end up crossing the event horizon, Akame can only laugh as Tatsumi says the best they can do is give it they're all in the end. As the time of the sisters fateful duel came upon them Both he and Leone stood by on the sidelines as the two sisters exchanged friendly commerce of the old days.
Meanwhile when the battle between the two intensifies Wave manages to close in on they're location forcing Tatsumi to forfeit one of his Teigu's uses in order to repel boarders after he tried to intervene. As Wave finally did get past his defense, Tatsumi showed up just as the interloper managed to dissuade the fighting, offering to take himself and Kurome out of the revolutionary war after having admitted his love for said teammate just as Leone comes in after checking the surrounding area for more insurgents. But this causes Kurome to mentally break down due to her conflicting natures of not wanting to fight her sister and her loyalties to a corrupt empire that ruined her life; to sever such anointment's tying her down, the remnants of Night Raid witness as the former Jeager smashes her Yatsufusa. Carrying her off to unknown territory taking themselves out of the conflict off of the Jeagers Afterwards,
Tatsumi shows further signs of degradation due to Incursio's influence once he diffused his weapon, a moment to which Akame laments due to her feeling responsible. But they all cheer up after Leone mentions how Wave single-handedly prevented the deathly battle between siblings and removed two Jeagers from the equation saving countless lives.When the time for the assault on the empire arrived, Tatsumi would be on the front-line battling Esdeath's formidable ice cavalry. Soon, Esdeath herself joins the battle, seeking to crush the revolutionary army's commander only to be halted by Tatsumi. Despite being a bit winded during their brief one on one battle, Tatsumi while getting stronger, fought a now serious Esdeath to a standstill until the empire signaled her to retreat.
Upon seeing the empire's trump card, Shikoutazer on the field, Tatsumi wasted no time rushing to confront the young emperor. Due to the emperor being confused and inexperienced with the ultimate teigu, Tatsumi easily dodged its assaults and landed a counterattack giving him as well as the revolutionary army confidence that he could prevail.
Once Shikoutazer's trump card "purge mode" had been activated, the Emperor seemed to lose his remaining sanity and began firing indiscriminately. Witnessing the destruction, Tatsumi attempted to get the mad Emperor to understand what he was doing only to be met with resistance. Tatsumi would continue to bounce between being defensive and offensive until a stray missile headed towards civilians prompted him to jump in between the two. By saving the civilians, Tatsumi was left open for incoming attacks. The Emperor then pierced Tatsumi with a blade extending from the ultimate Teigu and subsequently punched into the ground.
With Incursio smashed and nearing death, Tatsumi saw an image of Mine, after apologizing and saying he'd return to her when suddenly he's healed and Incursio fixed. Although shocked at first, he realizes what has occurred and incursio sprouts a pair of dragon wings declaring he'll stop the Emperor no matter the cost.Before Shikoutazer could prepare to attack again, Wave arrived on the scene with the intention of evacuating civilians and because he owed Tatsumi a debt. Despite his team up with Wave, Tatsumi determined that he needed more power to defeat his foe and thus he forced Incursio to evolve once more. After obtaining more power, Tatsumi was able to force the Emperor to go on the defense and together with Wave they were able to heavily damage Shikoutazer's armor. Once Wave leaves to help civilians, Tatsumi is able to give his full attention where he once again tries to have the Emperor see the destruction he's causing only to be met with resistance again.
Recalling Susanoo's advice, Tatsumi searches for and locates the weakened area within Shikoutazer's armor. The Emperor calls for aid prompting Esdeath's appearance which worries Tatsumi because their team up would ruin his gained momentum. Akame arrives and holds the general at bay while Tatsumi focuses on Shikoutazer. Upon asking for more power, Tatsumi feels his consciousness slipping again and with some encouragement from a imagined Bulat, Tatsumi is able to regain his consciousness and Incursio evolves one final time. With his new power, Tatsumi is able to plow through Shikoutazer's blasts, its weakened armor, and right through its body to finally destroy the Teigu and end the Empire's reign after more than a thousand years.
Immediately after destroying the ultimate Teigu, Tatsumi is overcome by Tyrant's influence and retrained. The revolutionary doctor concludes that upon receiving a fatal wound, Incursio possessed Tatsumi only for his burning passion to keep him in check. Tatsumi escapes his retrains and heads for Esdeath where Akame begs him to fall back only for Tatsumi to respond by saying Mine must be cold and that he wants to be of some use before he's completely overtaken by Tyrant. Tatsumi smashes through several of Esdeath's attacks and is later wounded by her. Before he could attack Akame who had rushed to his aid, Tatsumi was able to stop himself and begged Akame to kill him before his conscious completely faded. He also reminded Akame about her promise to kill him should he turn into a dragon. Akame than stabs him with Murasame and its curse's markings spread over his body as he collapses.
After Akame mortally wounds Esdeath, Tatsumi is seen flying towards them. After meeting up with Akame and Najenda, it is explained that Akame only targeted and killed the Tyrant but saved Tatsumi. Happy that he is still alive, even as a dragon, Tatsumi thanks Akame for helping him keep the promise to survive he made to her.
Tatsumi's transformation becomes one of Akame's motivations to search for a way to return him to human form again.
Akame herself made numerous referral to him during her interactions with the Natives of Wakoku during her search to find a way to return him to human form.
He later inherits one from Bulat, becoming the successor of Incursio. During Tatsumi's first activation of his Teigu, Tatsumi forces the demon armor to evolve to match his movements and battle-style. Soon after, Tatsumi disciplines himself to new extends in order to fully master his new Teigu, unlocking its abilities at a staggering rate. Thanks to Bulat's training on Mt. Fake, Tatsumi is able to develop a sixth sense, becoming more aware of his surroundings. After the one month time-skip, Leone comments on how Tatsumi was getting closer and closer to Bulat's level of strength and proficiency after seeing him materialize and utilize Neuntote, the spear/halberd auxiliary weapon.
Even before obtaining a Teigu, Tatsumi was a force to be reckoned with due to his already honed battle skills. Having been taught swordsmanship and hand-to-hand combat by an ex-military official since a young age, Tatsumi has since improved, being able to take much large and experienced opponents down with ease.
After having donned Incursio for the first time, Tatsumi begins to rely on unarmed hand-to-hand combat more often than he used to, and is seen to be exceptionally skilled in fighting opponents even while unarmed, as seen during a tournament held by Esdeath, utilizing the devastating, remarkable physical strength he possesses, and supplementing this with his close quarters combat skill. Upon training his body in order to master his Teigu, Tatsumi becomes able to defeat a member of the "Temple of the Imperial Fist" despite the difference in both size and experience with ease without having to use Incursio. Tatsumi's overall strength becomes so high that while using Incursio, he can easily obliterate a boulder many times his own size. Even without Incursio, Tatsumi has shown that he was strong enough to lift a bear-like Danger Beast with ease after killing it.
After forcing Incursio to evolve once more through his strong emotions, Tatsumi's strength and speed had reached to incredibly high levels that he managed to fight on par with both Esdeath and Budo, especially due to Incursio having also evolved to be able to resist both ice and lightning attacks, the former of which allows Tatsumi to even resist the effects of Esdeath's Trump Card, Mahapadma, for a moment. From Bulat's advice of being aware of his surroundings, Tatsumi had managed to avoid one of Budo's lightning attacks, allowing him to deal a powerful blow that injured Budo.
Another thing to note is that similar to how Wave is the first one in the series to deal a clean, powerful blow on Akame, Tatsumi is the only one to have ever done the same to Esdeath as well as General Budo, a feat that surprised Esdeath, Akame, and even Tatsumi himself. However, this is more due to how Esdeath's affections for Tatsumi, added with her enjoyment of the battle along with the Great General's lack of combat experience coupled with blind fury, had given Tatsumi an opening for both instances.
From the forced evolution of Incursio, the Teigu has begun to bond with Tatsumi, to the point that Tatsumi was to become Tyrant's new dragon body, something that would break and kill Tatsumi, giving him a limit of 3-4 more uses of Incursio before the effects take over fully. This has also made it that he is now resistant against poison, even a deadly one from Cosmina, due to how he had managed to survive the poison trap the Prime Minister had placed on Incursio's hilt that would have fell a High Class Danger Beast in an instant. This also allowed Tatsumi to fight, overwhelm, and kill Cosmina when she became a hybrid Danger Beast. Dorothea claimed that Cosmina would have had advantage over Tatsumi if she had fed on other humans for another two days. Though, despite this statement, Tatsumi was able to repel both Budo and Esdeath, two of the Empire's strongest.
Esdeath once carefully noted how powerful Tatsumi became and how Incursio continued to evolve, as shown when they battled on the day of the Revolution. Despite unable to land a fatal blow on the Empire's strongest, he is still shown to be more than able to hold his own against her and even hold her back from attacking the rebels. This proves his sheer strength and ability to adapt to his opponent.
Tatsumi is even able to be hit by Esdeath's dangerous 'Hagel Sprung' technique with no injuries whatsoever.
Tatsumi reaches the pinnacle of his strength after forcing his Teigu to evolve once more, needing a boost of power to defeat Shikoutazer, Tatsumi is shown to receive a massive increase in power, to the point where he can inflict serious damage to Shikoutazer. He is able to destroy the Supreme Teigu in a matter of two hits, the second one piercing through the Supreme Teigu's weakened area. He is also able to withstand Shikoutazer's devastating artillery strikes.
Unfortunately, despite this transformation being indescribably powerful, it is not shown to last long as Incursio's influence quickly brings it to an end.
Tatsumi is an all-around fighter with a mountain load of potential that is noticed by Leone, Bulat, Esdeath and Budo among others. Leone is the first to notice Tatsumi's potential and recommends him as a new recruit. Bulat believes that Tatsumi will someday surpass him and leave him in the dust. Esdeath believes that with enough training, Tatsumi can become general-class. General Budo noted Tatsumi's prowess and ability in the heat of combat, remarking it all the more since he fused to his Teigu.
Other than his fighting abilities, Tatsumi is capable of using a forge to repair and create weapons. Although his skills at blacksmithing are only at a beginner's level, it is still used as his cover while in the Capital as shown when he is announced as 'Tatsumi the Blacksmith' during Esdeath's competition. Tatsumi is also shown to be a very capable chef, having done some of the cooking for Night Raid at the beginning of his career.
- Tatsumi's name means "Sleeping Dragon", which seems to be a reference to his hidden potential, which has been noted by many different characters in the series. The first creature he was shown fighting was an Earth Dragon, and he later obtained the "Demon Dragon" Teigu.
- Ironically, in the end of the manga series, he has transformed into a literal dragon.
- His parallel in the Jaegers is Wave.
- Tatsumi is apparently a fan of the manga Hatsukiai, which is published in Gangan Joker, the same publication that Akame Ga Kill! appears in.
- He had a rather large forelock of hair on top of his head which has a tendency to be rather expressive during times of emotion, such as when Esdeath walks into her bedroom half naked, it stands straight up.
- Tatsumi was briefly mentioned at Hinowa ga Yuku! where Akame mention him as her quest is not only to undo Murasame's curse on her but also a way to make Tatsumi human again during her meeting with Hinata at Elder Class.