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. Uniquely, he does not 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 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 severed. He is the King of Demons. He possesses tentacles, which are mainly used for injecting his blood or for attacking. He only cares about himself. Quite cold.

Name: Doma Age: Over 133 years old Gender: Male Blood Demon Art: Lotus Ice Characteristics: Has rainbow-colored eyes. During his human years, 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: He was a Demon Slayer during his human years. It is presumed he became a demon out of jealousy because his younger brother's swordsmanship was far superior to his own. It is also thought he became a demon because those with the Mark die at age 25. He is Upper Rank 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.