Byakkomaru

Byakkomaru 「白虎丸, lit. White Tiger」 is a high-ranked manifestation-type demon of the Black Demon Series. It formed a contract with Shinya Hīragi and became his Cursed Gear.

Appearance
Byakkomaru's weapon takes on the form of a black, sniping rifle with a bayonet attached at the end. It can either fire off a rapid succession of bullets or fire a single bullet to manifest Byakkomaru.

Byakkomaru manifests as a gigantic white tiger, surrounded by bright blue flames. The tiger can split into multiple tigers if it's in manifestation form. Each tiger seems to have an individual will, as shown in the fight against Shinoa's squad.

Book 6
Byakkomaru was contracted with Shinya in Book 6 of Catastrophe. According to the Light Novel, Shinya underwent an operation to increase his chances of handling a Black Demon Series weapon, and he emerged from the operation successfully. Ever since then, Byakkomaru became his primary weapon.

Forms and Abilities

 * Demon's Thrall: Byakkomaru can enter it host's dreams and memories to create nightmares and break it's host's will. This is done in order to take over his body. This ability can only be used against his host.
 * Basic Form: Byakkomaru takes the form of a rifle. Byakkomaru's specialty is long-range firing and it is not very effective in close-range combat.
 * Multiple White Tigers: Shinya can fire bullets which splits and then manifests into several tigers. Each tiger can move independently, as if they have a will of their own.
 * Hidden Bullet: Shinya can fire a bullet which appears behind his target, as shown when fighting with Yūichirō Hyakuya in Chapter 17: Cursed Guinea Pig. It is shown to be an effective surprise attack, but Shinya revealed to Yuichiro that he can only activate that ability in an unspecified amount of time.

Trivia

 * In the fanbook, it is revealed that the tigers are fired from the rifle. Shinya fires a single bullet, which then manifests into Byakkomaru's tiger form.