A rationalist who hates waste and provides extremely strict guidance to his students. However, this is to help them acquire the "strength to survive," and he is deep down a compassionate person who cares for his students. He has two rectangular tattoos on his right cheek and wears roller skates. Kyoya calls him "Dano-chi." His Blood Eclipse Release is "Ryoran Shigure" (Profuse Drizzle). He creates a "Blood Umbrella" and rains down "Blood Rain" from it to dominate the entire battlefield. His techniques include "Uka Tensei" (Rain-Pass Reincarnation), summoning multiple "Blood Archers" in the sky to fire a barrage of arrows like blood rain; "Seisoryu Tei no Jiyu" (Merciful Rain of the Twin Holy Dragon Tears), manipulating the accumulated blood rain to raise a giant blood dragon from the ground; and "Okami no Kami," his strongest move, summoning a giant long-haired "Blood Giant" to suppress enemies from multiple angles.

Former Commander-in-Chief of the Support Unit at the Kyoto Branch of the Oni Agency, and currently the school nurse at Rasetsu Academy. He was in the same class as Naito Mudano and Masumi Yodogawa at Rasetsu Academy. He calls Mudano "Dano-chi" and Masumi "Massu" (he is the only one who does this). His Blood Eclipse Release is "Hyper Recovery," which multiplies an Oni's natural healing ability many times over.

Captain of the Nerima Ward Reconnaissance Unit. He was in the same class as Naito Mudano and Kyoya Oiranzaka at Rasetsu Academy. Kyoya calls him "Massu," but he hates the nickname. His Blood Eclipse Release is "Kanzan Kyozetsu" (Total Rejection/None of My Business). By licking his own blood, he can turn himself, his clothes, and anyone he is touching invisible for 10 minutes.

Vice-Captain of the Nerima Ward Reconnaissance Unit. He usually runs a secondhand bookstore and exchanges information with Oni using secret codes. He is a secret fan of Mudano and styles his hair similarly. His Blood Eclipse Release is an unnamed ultrasonic ability that emits ultrasonic waves from bottled blood to detect things over a wide area.

Vice-Captain of the Suginami Ward Combat Unit. He is characterized by short blond hair, a scar over his left eye, and a tattoo of the Virgin Mary on his chest. Despite his rough, yakuza-like appearance, he is known as the "Holy Mother" because of his caring nature, such as looking after children's health. His Blood Eclipse Release is "Shugo no Jindai" (Guardian's Age of Gods), which creates a barrier. A small amount of blood creates a barrier that disappears quickly; maintaining it requires more blood. The strength also scales with the amount of blood used.

Captain of the Suginami Ward Combat Unit. While he has a decadent and lazy side, he is passionate and prioritizes rescuing his comrades in times of need. His Blood Eclipse Release is "Seijin Haigyo" (Saint's Retirement), which allows him to partially reproduce stories from textbooks.

A part-time instructor at Rasetsu Academy and a member of the combat unit. She is characterized by a two-faced personality and high physical ability. Her Blood Eclipse Release is "Unryu Henkan-gi: Liar Liar" (Cloud-Flow Transformation: Liar Liar). She can transform into objects or people she has touched. She can store up to three transformations, but the drawback is that she cannot change her height.

A part-time instructor at Rasetsu Academy and a member of the combat unit. Despite having weak bronchial tubes to the point of coughing up blood daily and being a slow runner, he has an extremely positive and passionate personality. His Blood Eclipse Release is "Futamata no Hozoko" (Bifurcated Flaw).