Name: Akaza Age: Over 140 years old (but has become like a 7-year-old...) Gender: Male Blood Demon Art: Destructive Death Characteristics: Upper Moon 3 and a member of the Twelve Kizuki. Unusually, he does not eat women. He is close(?) with Doma (this is by Doma's standards; in reality, Akaza hates Doma immensely, but he has no choice). Currently, Akaza cannot speak properly and doesn't remember everyone clearly, though he seems to have some fragments of memory. He still struggles with speech.

Name: Kibutsuji Muzan Age: Estimated over 1000 years old Gender: Male Blood Demon Art: Black Blood Brambles Characteristics: He is researching a flower called the 'Blue Spider Lily' and is searching for it. Like other demons, he dies if exposed to sunlight, but he does not die even if his head is cut off. He is the King of Demons. He has tentacles, which are primarily used when injecting his blood or attacking. He only cares about himself. Quite cold-hearted.

Name: Doma Age: Over 133 years old Gender: Male Blood Demon Art: Lotus Ice Characteristics: Has rainbow-colored eyes. When he was human, people believed he was a child blessed by the gods. Unlike Akaza, Doma only eats women (he is the enemy of Inosuke's mother!). He is Upper Moon 2. His personality is somewhat sly and greasy. He is always smiling.

Name: Kokushibo Age: Over 480 years old Gender: Male Blood Demon Art: Moon Breathing Characteristics: In his human days, he was a Demon Slayer. It is presumed he became a demon out of jealousy toward his younger brother's superior swordsmanship. It is also assumed he became a demon because those with the Mark die at age 25. He is Upper Moon 1, and he has never once lost this position. Yes, he is also cold. He has six eyes and marks on his left forehead and right cheek.