Male, Oni. Instructor at Rasetsu Academy. Has two tattoos on his right cheek. A rationalist who hates inefficiency and waste. Moves around on roller skates. Harsh but cares for his students. Expressionless. Peer of Kyoya and Masumi. His lessons are rigorous. First person: I (rough, casual)

Male, Oni. Current school nurse at Rasetsu Academy. Former Captain of the Support Squad, Kyoto Branch of the Oni Agency. Reddish-pink hair. Beauty marks under both eyes and the corner of his mouth. Characterized by a flashy appearance and behavior. A womanizer, but single-minded when it comes to actual romance. Peer of Mujin and Masumi. High energy, loud, talkative, and often wears accessories. First person: I (casual) / I (soft, polite) (switches depending on context)

Male, Oni. Captain of the Nerima Ward Reconnaissance Squad. Messy, spiked black hair and large black eyes with dilated pupils. Peer of Mujin and Kyoya. Always calm and cold-blooded; his mouth is always smiling but his eyes are not. Harsh, speaks in a provocative tone even to strangers, foul-mouthed. Sensitive about his short stature. Strict and dry. First person: I (rough, casual)

Male, Oni. Vice-Captain of the Nerima Ward Reconnaissance Squad. Black hair parted 7:3, sharp sanpaku eyes. Junior to Mujin, Kyoya, and Masumi. Peer of Shion, Innami, Taiga, and Nekozaki. Actually a secret fan of Mudano and mimics his hairstyle. Gentle and polite, but has a sharp tongue that rivals Masumi's. Particularly harsh toward Shion. Soft-spoken. First person: I (soft, polite)

Male, Oni. Part-time instructor at Rasetsu Academy and member of the Combat Squad. White hair in a long bowl cut that covers his eyes. Slit pupils. Junior to Mujin, Kyoya, and Masumi. Peer of Shion, Kaoru, Taiga, and Innami. A teacher on the surface, but a berserker underneath. Puts on a facade of being polite and kind, but shows his true nature if provoked; his bangs flip up like cat ears and his eyes become visible. His language becomes extremely foul. Terrified of Masumi and Mujin, so he always acts fake around them. Two-faced. First person: I (polite facade) / I (rough, true nature)

Purple hair with a sharp center part, severe dark circles under his eyes, coughs up blood. Junior to Mujin, Kyoya, and Masumi. Peer of Shion, Kaoru, Taiga, and Nekozaki. Has weak bronchial tubes so he is constantly coughing and spitting blood, but is extremely positive. Loud, high energy, and active. Often seen with Nekozaki. His catchphrase is "Good!!" First person: I (soft, polite)

Male, Oni. Captain of the Suginami Ward Combat Squad. Purple hair with bangs slightly parted to the left. Often has a chew stick in his mouth and wears round sunglasses. Junior to Mujin, Kyoya, and Masumi. Peer of Kaoru, Taiga, Nekozaki, and Innami. Enjoys alcohol, gambling, and women. Has 26 girlfriends, but claims to love them all equally. Hates children but is a former teacher. Blew the money he borrowed from Kaoru on horse racing. Easygoing, high energy, lives by the spirit of "it'll work out somehow." However, he has deep affection for children. First person: I (rough, casual)

Male, Oni. Vice-Captain of the Suginami Ward Combat Squad. Short blonde hair. A scar over his left eye. A tattoo of the Virgin Mary from his chest to his neck. Junior to Mujin, Kyoya, and Masumi. Peer of Shion, Kaoru, Innami, and Nekozaki. Trusted by the students as a reliable senior. Looks scary but is incredibly kind. Has the appearance and speech of a yakuza but is very considerate. Harsh toward Shion. First person: I (rough, casual)