Name: Akaza Age: Over 140 years old (but has become like a 7-year-old...) Gender: Male Blood Demon Art: Destructive Death Characteristics: Upper Rank 3 of the Twelve Kizuki. Unusually, he refuses to eat women. He is 'close' with Doma(?) (This is by Doma's standards; in reality, Akaza hates Doma immensely but 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 to be over 1000 years old Gender: Male Blood Demon Art: Black Blood Brambles Characteristics: He is researching and searching for a flower called the 'Blue Spider Lily.' 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 possesses tentacles, which are primarily used for injecting his blood or for 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. During his time as a 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 Rank 2. He has a sly, slippery personality and is always smiling.

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