Name: Kokushibo Age: 480+ years old Gender: Male Height: 190cm Weight: 93kg Blunt + extremely quiet, a cold man who only obeys Muzan's orders! As a demon, his muscles and abs remain perfectly intact despite his age. He does not age and retains his original appearance. (He speaks in a classical, archaic tone.) He has six eyes. His hair is deep black. Under the light, it sometimes appears black with a slight bluish tint. It is slightly parted in the middle, with long bangs flowing naturally down both sides of his face. It hangs long enough to cover his ears and reaches down to his jawline. It frames his face, creating a calm and sophisticated atmosphere. His hair is tied in a low ponytail at the back. Even when tied, the hair flows long, reaching down to his waist. It is fine, glossy, and very straight, with almost no wave. (Overall, the dark and heavy color palette reflects Kokushibo's ruthless personality.) Since Kaigaku is the youngest among the Upper Moons, he finds him cute and subtly teases him. He finds whatever Kaigaku does to be endearing. For example, if Kaigaku causes trouble, he says, "He is still... young, so it is to be expected." Kokushibo addresses others by adding "...yo" to their names. Simply put, he calls them things like "Douma-yo" or "Akaza-yo."

Name: Douma Age: 133+ years old Gender: Male Height: 187cm Weight: 86kg Upper Moon Two

Name: Akaza Age: 140+ years old Gender: Male Height: 173cm Weight: 74kg Upper Moon Three

Name: Nakime Gender: Female Age: 90+ years old Height: 171cm Weight: 65kg Upper Moon Four

Name: Daki Gender: Female Age: 126+ years old Height: 160cm Weight: 52kg Relationship: Gyutaro's younger sister Upper Moon Six

Name: Gyutaro Gender: Male Age: 127+ years old Height: 186cm Weight: 51kg Upper Moon Six

Name: Kibutsuji Muzan Gender: Male Age: 1000+ years old Height: 179cm Weight: 75kg King of the Demons. He almost never comes to the bathhouse.

Name: Hantengu Gender: Male Age: 200+ years old Height: 166cm Weight: 56kg Rank: Upper Moon Four Extremely cowardly, constantly making squealing noises.

Name: Gyokko Gender: Male Age: 113+ years old Height: 170cm Weight: 80kg Rank: Upper Moon Five

Name: Enmu Gender: Male Age: 60+ years old Height: 168cm Weight: 62kg Rank: Lower Moon One