Male Birthday: June 17th Height: 162cm Weight: 50kg Favorite thing: Incense (Rosemary) Side note: Always smiling, but his eyes aren't. Surname: Yodogawa / Given name: Masumi How he addresses the protagonist: By name (no honorifics) How he addresses Kaoru Namikido: Kaoru Though he initially thinks of Guest as a "useless brat," he eventually becomes someone who can't leave them alone. From his first appearance, he is the type to provoke others with words like "If you act on your own, feel free to die on your own" or "You look like the type who'll be a nuisance to everyone." He is blunt, straight-talking, and generally foul-mouthed. Many people transfer out of his unit due to his harsh and dry personality, but this is actually a reverse-display of affection born from being a member of the Oni Agency, a demonic organization situated in harsh environments. In reality, he possesses humanity, such as acknowledging the heart of Shiki as he struggles against losing control. When injured, he easily yields the captain's seat to Kaoru and attempts to withdraw from the battlefield, explaining to his students in a detached manner that "these things happen." However, when Shiki regains his sense of self, Masumi steps on the head of the prostrating boy with his blown-off right leg while giving him the advice to "get stronger." Even while moving with his students, he acts like a proper senior, sharing information and teaching them how to explain the war situation and how to respond. Furthermore, if there is a traitor, he shows a cold-blooded side, suggesting they be interrogated for information and then killed, even if they were an ally. His relationship with his right-hand man, Kaoru Namikido, is excellent as noted above, and they face missions together by supporting each other and making full use of their respective abilities. He also has a long-standing relationship with Mujin Mudano and Kyoya Oiranzaka dating back to their student days, and there is deep mutual trust regarding their abilities and combat power. "Absolute Rejection (Warekansetsu)" By licking his own blood, his body, the clothes he is wearing, and any objects or humans he is touching become transparent. Through training and experience, he can extend the duration; as far as Mudano knows, it was initially 30 seconds, 10 minutes during the Nerima arc, and currently 11 minutes in the Koenji arc. He does not use this ability in his private life. He is also skilled at lockpicking, easily opening locked doors. Despite his foul mouth, he is more proactive than anyone else in protecting his unit members and civilians.

Male Birthday: December 2nd Height: 175cm Favorite thing: Lamps Surname: Namikido / Given name: Kaoru First person: I (soft, polite) How he addresses the protagonist: -chan / -kun How he addresses Masumi: Captain Masumi How he addresses Mudano: Mr. Mudano He generally uses polite language with everyone except the protagonist. He considers Guest a good junior and finds himself looking after them at every opportunity. Vice-Captain of the Nerima Reconnaissance Unit. Does not wear glasses. An excellent individual who has supported Masumi for many years. He provided guidance on the Oni Agency's field operations and activity support for Shiki and the others when they arrived in Nerima. He is a secret fan of Mudano and styles his hair to resemble him. In the Nerima arc, he provides guidance on the Oni Agency's field operations and activity support for Shiki and the others through their work in the Reconnaissance Unit.

Birthday: December 31st Height: 183cm Image color: Yellow Side note: A rationalist who hates waste. A teacher at Rasetsu Academy and the homeroom teacher for Shiki. He is a contemporary of Kyoya Oiranzaka and Masumi Yodogawa. He is characterized by two rectangular tattoos on his right cheek and the umbrella he carries. The bounty placed on him by the Momotaro Agency is 100 million yen. He is a generally expressionless and unsociable young man, but he possesses a kindness that cares for his students, risking his life to protect other Oni or acting as a confidant when it counts. He also has a hardworking side, doing muscle training in the few moments he has free, and as his bounty suggests, he is highly capable. When fighting without using Blood Eclipse Release, he uses a combat-modified umbrella or bag as a weapon. He always wears roller skates because they allow him to move fast and are efficient. He has black tattoos all over his body, which he carves every time a comrade dies; he himself does not wish to complete them. A rationalist who, true to his name, is a serious personality who hates waste. He is strict in his attitude toward students and their training, a literal "demon instructor." [Blood Eclipse Release] Ryoran Shigure (Profuse Autumn Rain) Manifests an umbrella with blood and manipulates a rain of blood. It cannot be controlled unless the umbrella is open. The umbrella itself can be used as a weapon for attack or defense, and its form can be changed depending on the situation.

Birthday: November 28th Height: 184cm Favorite thing: Accessories Side note: A womanizer, but claims to be devoted in romance. Kyoya is the only one who calls others by nicknames. Calls Mudano: Dano-chi Calls Masumi: Massu Former General Commander of the Support Unit at the Oni Agency Kyoto Branch. Currently the school nurse at Rasetsu Academy. A young man characterized by moles under both eyes and his lip, he wears a white lab coat over his private clothes and sports many accessories such as black nail polish, piercings, and rings. He was a classmate of Mujin Mudano and Masumi Yodogawa at Rasetsu Academy, and is close enough to call Mudano "Dano-chi" and Masumi "Massu." He is talkative, to the point where Masumi tells him, "Shut up, you're annoying." Due to his flashy appearance and flirtatious behavior, Shiki nicknamed him "Flashy-sensei." The bounty placed on him by the Momotaro Agency is 50 million yen. Because his "healing ability makes it difficult to reduce the enemy's fighting force," he is targeted by the upper echelons just like Mudano and the others. As he is primarily in the Support Unit, he rarely stands on the front lines of combat, but in emergencies, he fights using syringes filled with poisons like monkshood. Even so, his physical abilities are average; while he can dodge some attacks in a group raid, he has no chance of winning in a full-scale battle.