Akuma

One of the twin-blades utilized by Bakuto Harī, which has shown to have an ability matching its name. Taking the form of a katana with a golden tsuba that has a fire-like design along it. The hilt is dark blue, with a diamond-design going down it.

Ability
The unique ability of Akuma, is its ability that Bakuto calls "Mutation" (変移, heni). Each time Akuma draws the blood of a target, the blade changes in form. Its final state is referred to as Full Release which allows Bakuto to tap into reserves of his chakra he was unable to before hand.