Itou, Kamotarou

伊東鴨太郎

Itou serves as an advisor to the Shinsengumi, though he is later exposed as a traitor whose ambitions Takasugi exploited in an attempt to dismantle the group from within. Viewing himself as a rival to Hijikata, he succeeds in getting him suspended from the Shinsengumi and subsequently attempts to assassinate Kondo. However, his scheme is thwarted by members of the Shinsengumi and the Yorozuya. After losing his left arm and being defeated by Hijikata, he begins to recognize the significance of the bonds he had formed within the Shinsengumi and how foolish it was to betray his dear friends. He is granted one final duel with his former rival and is permitted to die as both a friend and a warrior.
Itou is roughly based on Itou Kashitarou of the Shinsengumi.