Shikoutazer

Imperial Guardian: Shikoutazer is a massive armor-type Teigu used by the very head of The Empire as a last line of defense if the Capital was ever to be destabilized. The suit itself is extremely massive and tall enough to overlook the Empire itself.

History
The Teigu itself was built and passed throughout generations to the Empire's heads to be used as a last line of defense if the Capital was ever to be placed under imminent threat. For centuries, it was stored deep underground, right beneath the Emperor's palace. At one of their assemblies, Syura alluded to this particular Teigu, whilst emphasizing its power. During the Revolutionary Army's uprising, Honest advised the Emperor to use this particular weapon against the rebels.

Abilities
To prevent it from being used by the Empire's enemies, Shikoutazer was designed so that it could only be wielded by those of royal bloodline.

It is heavily armored, protecting its user from nearly any attack directed towards them as well as being able to deliver devastating blows. Shikoutazer's armor is so powerful that it is able to take multiple hits from both Wave and Tatsumi, with The Emperor commenting that their attacks haven't even left a scratch. Its armor is so strong that only a mutated, evolved Incursio can actually pierce through it.

However, the Supreme Teigu was shown to have a weakened area where Mastema, the Winged Teigu, had detonated an explosion. Tatsumi used this area to finally destroy Shikoutazer.

In the manga, it is able to fire a massive ray of energy from its chest-plate, discharge mortars from its shoulder pads, launch explosive cores from a mouth piece and multiple homing missiles from cannons across its back & lower torso.

The Teigu's core treats like an interactive Zero-G cockpit which is controlled through the motions and actions of the host inside, it sports its own HUD display system to ascertain its surroundings as well as opposition attack strength and numbers as shown while fighting Tatsumi and Wave.

Trump Card
It is unknown if this Teigu has a natural Trump Card. However, thanks to alchemy, Honest and Dorothea modified this Teigu to add an unnatural Trump Card. It can be activated by Honest via his command or at his demise.

Purge Mode: When its Trump Card is activated, Shikoutazer sheds its armor to reveal monstrous flesh while the user is corrupted by alchemic creatures & becomes a cold-blooded mass murderer. The Teigu's abilities are improved dramatically. It can charge alchemic energy concentrating it around its chest cavity to create and fire a dark singularity bomb, produce small fecal looking clumps from its mouth which unfurl into a horde of danger beasts and project a retractable organic steel blade from its hands reaching up to incredible lengths; from the castle grounds to common place. Other abilities it has includes augmented toughness and resilience, and a final armament which is the ability to fire multiple wave motion blasts from its various eyes on the body armor.

Manga & Anime Differences

 * In the anime, the emperor pilots Shikoutazer directly while in the manga, he controls it telepathically.
 * In the manga, due to being upgraded by Dorothea, Shikoutazer has a second form called Purge Mode.
 * In the anime, due to its size, mobility is very limited, but it is however, armored with various equipment that enables its user to gather energy and expel large amount of shock waves throughout various parts of its body. The armor places huge amount of strain on the user, eventually weakening its main defense, primarily in its abdomen region.
 * The anime variant lacks the additional weaponry like missiles.

Trivia
Shikoutazer
 * In the English dub, Shikoutazer was renamed to Primus Imperator, which means "First Emperor" in Latin.