Seryu Ubiquitous

Bio
Seryuu is a member of the Jaegers, formerly of the Imperial Guard. She is a young girl with a strong (and twisted) sense of justice. She was willing to go as far as to allow Dr. Stylish to implant weapons into her body in order to better punish those she considers evil. Her mentor and superior, Captain Ogre, and her father were part of Imperial Gaurd and both met their ends at hands of revolutionaries, causing Seryuu's extreme thirst for punishing evil. She is often seen with her pet dog "Koro", which is actually a Biological Teigu. She briefly meets Tatsumi, and is oblivious to the fact that he is a member of Night Raid. Later, she encounters Schere and Mein and a confrontation occurs. After having her arms cut off by Schere, she reveals that guns have been implanted into each of them, and proceeds to shoot Schere, wounding her fatally. As a result, both Mein and Tatsumi have an intense desire to kill Seryuu.

When Tatsumi is abducted by Esdese and brought to the Jaegers' HQ, Seryuu recognizes him from earlier, and attempts to touch him. Tatsumi feels intense rage toward Seryuu for the death of Schere, and does not want to be friendly with her, but puts on an act in order to conceal his true identity. Later, when the Jaegers are ordered to clear out a group of bandits, Seryuu unveils more of her weaponry, killing dozens of bandits with the help of Koro.

After the death of Dr. Stylish, a depressed and grieving Seryuu is comforted by Esdese, showing a rare level of compassion from the ruthless sadist.

Equipment & Skills
Seryuu possesses a biological teigu called "Hekatonkheires" which she named "Koro". It is capable of growing to incredible size on command, and extending it's mouth open to reveal many rows of razor sharp fangs. It also seems to be very durable, being able to regenerate even after being blasted with Mein's "Pumpkin". After the battle with Mein and Schere, Seryuu receives prosthetic mechanical arms presumably from Dr. Stylish. Using the equipment of the late Dr. Stylish, she is able to rebuild her mechanical arms.

Trivia

 * her faces twists into a monstrous one when she fights.