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.

In the manga, it is able to fire a massive ray of energy from its chest-plate, multiple missiles including homing missiles from cannons across its body.

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

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. Teigu's abilities are improved dramatically. It can charge alchemic energy around its chest to create a dark bomb.

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.

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