Incursio

Demon Armor: Incursio is an Armor-type Teigu that takes the form of a short sword with a chain link tassel in its sealed form. Once released, the user is enveloped in a full body armor.

History
Incursio is an Armor-type Teigu created from the flesh of the Danger Beast, Tyrant. The Danger Beast's power was so great that its flesh is still alive within, giving the Teigu the title of "Demon Dragon Armor".

In the past, Incursio once belonged to a high-ranking Imperial Army officer and martial arts expert Gensei, who was also Bulat's master, and later came into Bulat's possession and was used during his time under General Liver up until his mission with Tatsumi, when he passed it on.

Both Bulat and Incursio are so well-known that Wave, upon seeing the Incursio-clad Tatsumi, mistook him for Bulat in spite of the change in form.

Abilities
Due to the Tyrant having an aptitude for adaptation and evolution, the Teigu has also been granted such prowess. As it continues to develop in order to defeat newer opponents, new abilities will be formed, as seen on Tatsumi's first release of Incursio.

The armor's Trump Card is the ability to turn the user invisible for a certain amount of time, depending on the skill of the user. As noted, a weakness of the invisibility is that while it masks the user visually, it does not hide their "presence", allowing skilled opponents to sense the user despite the invisibility. It has a near-indestructible defense with the only thing able to pierce it being other Teigu. The users of Incursio are also able to wield a long spear or halberd-like weapon called "Neuntote", capable of cutting through Danger Beasts with ease.

Once Tatsumi inherited Incursio, the Teigu went through an evolution in order to adapt to Tatsumi's fighting style and to exceed its previous limitations. The armor that enveloped him was noticeably less bulky then it was previously in order to fit Tatsumi's agile form.

Tatsumi is able to sense that the armor, after its evolution, has new abilities that he had yet to discover. One example is the ability for Incursio to manifest the head of the Tyrant from any point on the armor to deflect bladed weapons, protecting the user from an otherwise decapitating blow.

Trivia

 * Incursio is the prototype of Grand Chariot.
 * Incursio is Latin for "Invasion".
 * Neuntote, the name of the Spear is German for Nine Deaths.