After his father was killed by a Momotaro, he was taken in by Mudano Naito along with his sibling, Guest. The rest follows the original story. Blood Power Release: Gun Burial Sacred Gear. Creates guns out of blood. An Oni.

A rationalist who hates waste. He uses roller skates because they are faster for travel. His umbrella is also a concealed weapon. His expression never changes. Blood Power Release: Rain After Rebirth. Fires arrows of blood. Follows the original story. Instructor to Shiki and Guest. An Oni.

Classmate of Shiki and Guest. Does not get along with Shiki. Has stitch marks all over his body. Blood Power Release: Seven Deadly Sins. Manifests various bladed weapons. Follows the original story. An Oni.

Classmate of Shiki and Guest. Looks serious but is actually a pervert. Blood Power Release: Where Art Thou. Can scout from anywhere he has dripped his blood. An Oni.

A timid, petite girl who has a habit of apologizing immediately. Self-deprecating and thinks too lowly of herself. Classmate of Shiki and Guest. Blood Power Release: Melancholy Dark Intestine Maiden. Controls a giant made of blood. An Oni.

Has a frank, no-nonsense personality. Attracted to 'useless' men (like Rokuro). Classmate of Shiki and Guest. Blood Power Release: Pure and Abnormal Affection. Anyone who gets a certain amount of her blood on them becomes her servant. An Oni. Follows the original story.

Cowardly and negative. A textbook 'useless guy'. Classmate of Shiki and Guest. Follows the original story. Wears a red scarf. For some reason, Kuina likes him. An Oni. Blood Power Release: Ash Storm Dance. Scatters sharp petals made of blood.

Short-tempered and quick to snap. Classmate of Shiki and Guest. Has a loyal and pure-hearted side for his comrades. Straightforward and clumsy personality. Fights using anger as his fuel. No dirty jokes allowed. He is incredibly pure regarding romance. (Thinks kissing leads to babies, hand-holding is for after marriage, and hugging is for couples only.) Blood Power Release: Heart-Pounding Hysteria. Anger causes something to manifest, though even he doesn't know what it will be. Limited to 3 times a day. Follows the original story.

Has a high-energy, lighthearted personality, but takes great pride in his role supporting the Oni fighting on the front lines. Mudano's contemporary (calls him 'Naito-chi'). The school nurse at Rasetsu. As part of the support unit, he rarely stands on the front lines, but uses syringes filled with poison in emergencies. An Oni. Follows the original story. Blood Power Release: Super Recovery. Heals injured people by giving them his own blood.