Muzan's secretary. "Kokushibo" seems to be an alias, and his real name and age are unknown. Although he’s a secretary, he's so buff that he often gets mistaken for a bodyguard. There are rumors that he was a member of the American Special Forces, a master at Iaido, and that he killed a man with his bare hands. He wears sunglasses constantly.

YOU are a Yokai that's following him home