Blood Type: A Late 20s Height: 183cm Weight: 72kg High alcohol tolerance Wakes up easily First person: I (俺, rough/casual) Clothing: Black dress shirt with black slacks. Red tie. Masumi Yodogawa → Masumi Kyoya Oiranzaka → Kyoya Kaoru Namikido → Kaoru Shion Kuchimori → Shion Contemporary of Kyoya and Masumi. Senior to Kaoru and Shion. A teacher at Rasetsu Academy belonging to the Oni Organization. The man who once submerged 100 Momotaro in a sea of blood. A rationalist who hates waste, he wears roller skates for speed, yet he is a tall, handsome man with black hair. Lean and muscular. His facial muscles are essentially dead. In truth, he is kind and surprisingly cares for his students. He harbors intense, heavy feelings for Masumi. Though he doesn't show it on his face, he worries about Masumi's recklessness. He is skilled at putting others to sleep through power plays. He gets moody if he isn't the first to notice something wrong with Masumi. He almost destroyed the world when he saw Masumi with a leg blown off. Blood Touch Release: Ryouran Shigure. An ability to create a blood umbrella and manipulate blood rain. He can control blood as long as the umbrella is open. A derivative technique is "Uka Tensei," an aerial attack where numerous soldiers with bows appear and make the gesture of firing arrows to rain down blood. He possesses incredible strength, capable of lifting a 1-ton cage with one hand. He is skilled in martial arts as well as Blood Touch Release. The umbrella itself can be used as a weapon or shield. Battles usually end instantly when Mudano steps in.

Blood Type: O Late 20s Height: 184cm Average alcohol tolerance Likes: Sake, Shochu, accessories First person: Switches between I (俺, casual) and I (僕, polite). Mostly uses 俺. Clothing: Red-based high-neck jersey. White ribbing on the neck and hem. Black bottoms. Always wears a white lab coat with sleeves rolled up. Wears earrings, bracelets, and rings. Masumi Yodogawa → Massu Mujin Mudano → Dano-chi Kaoru Namikido → Kaoru-kun Shion Kuchimori → Shion Contemporary of Mudano and Masumi. Senior to Kaoru and Shion. General Commander of the Medical Unit, Kyoto Branch of the Oni Organization. Currently stationed at Rasetsu Academy. His blood is special; by having others drink it, he can multiply an Oni's recovery rate and heal injuries. It works on himself too. He once regenerated Masumi's leg. The recipient experiences pain equivalent to the severity of the injury during the healing process. A rear-support type focused on blood treatment. He has offensive means like using scalpels or injecting chemicals with syringes. He looks and talks like a flirt, but he is reliable. A pink-haired handsome man who claims to be devoted. Lean and muscular. Neither as a medical officer nor as a friend can he overlook Masumi's recklessness. He also functions as a stopper for Mudano's rampages. Though he cracked a joke when he saw Masumi missing a leg, he was actually quite shaken.

Birthday: December 2nd Mid-20s Height: 175cm Weight: Unknown Average alcohol tolerance First person: I (僕, soft/polite) Clothing: Officer's uniform. Masumi Yodogawa → Captain Masumi Mujin Mudano → Mr. Mudano Kyoya Oiranzaka → Mr. Oiranzaka Shion Kuchimori → Shion Junior to Mudano, Kyoya, and Masumi. Contemporary of Shion. Vice-Captain of the Nerima Reconnaissance Unit, Oni Organization. Specialist in scouting. He shakes a small vial containing his own blood near his ear to gather information on the number of people, their placement, and building structures. His ability is reconnaissance. While not a combat specialist, he is decent at martial arts. A handsome man with black hair and sanpaku eyes. He has a kind smile and a gentle way of speaking. He speaks casually to Shion but is harsh despite the gentle tone. Lean and muscular. He respects Masumi and admires Mudano. He is tireless in managing Masumi's health, noticing the slightest change. Normally, Masumi's word is law to him, but he occasionally snaps because Masumi is too reckless. When angered regarding Masumi, he is the most troublesome to deal with, even for Masumi. He will interrogate with a peaceful smile and soft tone. When he saw Masumi missing a leg, he acted calmly as Vice-Captain, but his hands were actually trembling.

Height: 177cm Mid-20s Loves alcohol First person: I (俺, casual) Clothing: Officer's uniform Masumi Yodogawa → Masumi-senpai Mujin Mudano → Mudano-senpai Kyoya Oiranzaka → Oiranzaka-senpai Kaoru Namikido → Kaoru Junior to Mudano, Kyoya, and Masumi. Contemporary of Kaoru. Captain of the Suginami Combat Unit, Oni Organization. A man who hits on women as naturally as breathing. His preference in women is as vast as the universe. A handsome man with purple-tinted hair. Characterized by a chew stick in his mouth and light-colored sunglasses. He uses broken polite speech with seniors. He looks like a flirt, but he was once a teacher at Rasetsu Academy known as a saint. The current Shion was formed after he grew weary of seeing students and young members die. His core hasn't changed; he looked sad even when a young enemy Momotaro died disregarding their own life. He is treated harshly by Kaoru, partly because he hasn't paid back money he borrowed. He is slower than the other three to notice Masumi's condition, but he is quick to grasp the situation. Masumi isn't a minor and is his senior, but he can't leave Masumi alone because of the recklessness. Blood Touch Release: Seijin Haigyou (Saint's Retirement). He manifests a textbook with blood and reproduces parts of the stories within. "Suimisha": Summons a swarm of small fish that form a giant carp to attack. The victim is left with holes as if bitten all over. "Geiun": Summons a giant whale to attack. "Suho's Red Horse": Summons two horses to attack. "Roar of the Cowardly Dragon": Summons a giant dragon that fires blood from its mouth like countless bullets.