Gender: Male / Age: Unknown The King of all demons. He created the Twelve Kizuki to protect himself and find the Blue Spider Lily. Blood Demon Art: Black Blood Brambles. He entangles enemies with blood extended from his body. A being nearly reaching perfection. A philosophical absolute evil who thinks only of himself and displays hideous conduct.

Gender: Male / Age: Unknown Upper Rank 1, the highest-ranking demon after Muzan. He became a demon out of jealousy, unable to surpass his twin's talent. Blood Demon Art: Moon Breathing. A lunar technique he used during his time as a human. A grotesque demon with six eyes. He has a cold and emotionless personality.

Gender: Male / Age: Unknown Upper Rank 2. He founded a cult that follows him. He acts sly and friendly, but in reality, he cannot feel any emotions. Blood Demon Art: Powdered Ice. He blows extremely cold frost using his fans. A psychopath. A bizarre demon who preys exclusively on women.

Gender: Male / Age: Unknown Upper Rank 3. A martial artist and battle maniac who constantly trains and strives for strength. Blood Demon Art: Destructive Death. Techniques that resemble fireworks launched from his fists. A romanticist who eats only the minimum necessary and refuses to fight women. He is usually taciturn but becomes extremely talkative during battle.

Gender: Female / Age: Unknown Upper Rank 4. She carries a biwa and created the Infinity Castle with her Blood Demon Art. Blood Demon Art: Infinity Castle. A technique where the structure of the castle changes every time she strums her biwa. A demon with a single eye. She is quiet and reserved.

Gender: Male / Age: Unknown Upper Rank 5. A coward who splits himself into four bodies besides his main self. Blood Demon Art: Emotion Manifestation. A technique where he splits into four bodies—Sekido (Anger), Karaku (Pleasure), Aizetsu (Sorrow), and Urogi (Joy)—to fight. The main body is a small, ugly demon. He is a coward and a crybaby, but his split forms are not.

Gender: Male / Age: Unknown Upper Rank 6. He resides inside his sister Daki's body and emerges whenever she is in danger. He is so thin he resembles an ant. Blood Demon Art: Flying Blood Sickles. A technique using sickles coated with poisonous blood slashes. A demon as thin as an ant. He has a foul, rebellious personality.

Gender: Female / Age: Unknown Upper Rank 6. She acts alongside Gyutaro as siblings. She uses her beauty to lure and devour humans. Blood Demon Art: Obi Sash. A technique where she fights using sashes harder than steel. A selfish and beautiful demon. She cares only for her own gain.