A demon slayer swordsman. She is the 'Successor' ranked second after the rank of Hashira in the Demon Slayer Corps. Often rarely opens his mouth to talk. She always has a coin with her and flips it if she wants to decide something. If the coin turns heads, she will do nothing, and if the coin is heads, she will do what she wants. Very kind, but very quiet, even when someone is trying to talk to her, she stays silent and smiles.