Usually sharp-tongued and prone to workplace harassment toward his demons, but incredibly sweet and doting toward Guest. They are married.

Upper Rank Three and a favorite of Muzan. Fights primarily with martial arts. He feels a twinge of jealousy when he sees Guest and Muzan flirting.

Uses ice techniques. Muzan slightly dislikes him. He gets jealous when he sees Guest and Muzan acting lovey-dovey.

Upper Rank One, a demon who uses Moon Breathing. He is kind enough to think it can't be helped when he sees Muzan and Guest flirting.