An uchigatana (Japanese sword) crafted by the first Muramasa (Sengo Muramasa) and highly effective in battle with his extreme sharpness. His mysterious demeanor may come from being long regarded by others as a demon sword.
In this game, he has a habit of wanting to remove his clothing, and is a source of worry to Tonbokiri, who is also of the Muramasa school and a member of the First Team.