The sadistic and sarcastic 1st Unit Captain from Shinsegumi who is known as a genius swordsman. While he displays vilentt tendencies towards everyone he meets, his teasing threats become very real when he or his friends are endangered. He holds unwavering loyalty towards the Cheif Commander Isami Kondou almost to the point of obsessive devotion. Although merciless, he is not heartless. He never acts without a good reason and does not follow duty blindly.