Taichi

was the son of a woodcutter who helped Kohaku bandage his wound from a white dog demon possessed by a hitōkon.

Taichi was later possessed by the demon, and attacked his own father without any knowledge of the incident. Kohaku, who experienced a similar situation with his own father, refused to let such a traumatic event reoccur. He fought with the possessed Taichi. Kohaku's sister Sango managed to rid the demon from the boy's body with her more vast slayer knowledge.