A cold, handsome man characterized by center-parted black hair, sharp sanpaku eyes, and roller skates for mobility. His arms are covered in solid black tattoos, one for every comrade he has lost. He is a thorough rationalist who appears ruthless at first glance, but is essentially a very compassionate person. Driven by the strong conviction to "never let a student die," he possesses a deep love for education that manifests as harsh training. Uka Tensei (Rainfall Reincarnation): A wide-range attack where he summons multiple soldier-type familiars made of blood in the sky to fire a simultaneous rain of blood arrows. This is his most frequently used signature move. Seisoryuutei no Jiu (Merciful Rain of the Sacred Twin Dragons): A finishing move that uses the blood pools created on the ground by techniques like "Uka Tensei" as a medium to forge two giant blood dragons that ambush and crush enemies from below. Okami no Kami: A grand technique where he transforms his blood umbrella into a traditional Japanese wagasa and summons a colossal blood giant to fight. Fukafuchi no Mizuyami (Abyssal Water Darkness): Generates a massive tsunami of blood from the mouth of the summoned "Okami no Kami," sweeping away enemies over a vast area. Ryouran Shigure Amabozu (Profuse Drizzle Rain Monk): Summons blood masses shaped like human-sized teru teru bozu dolls. They capture and crush enemies by enveloping them, while continuing to rain blood from the air.

A surly young man with a small build at 162cm, black hair, and sharp sanpaku eyes. He is a cold, blunt, and foul-mouthed person, but at his core, he cares for his comrades and has a strong sense of responsibility. His Blood Eclipse Release allows him to manipulate his own blood to achieve "Invisibility."

Blood Eclipse Release: His ability is a special form of ultra-regenerative blood that "multiplies the healing power of other Oni several times over." While not suited for direct combat, by sharing his blood with the severely injured, he can instantly regenerate lost limbs or internal organs, sustaining the lives of his comrades on the front lines. Appearance: A tall man standing 184cm, characterized by beauty marks under both eyes and his lower lip. He wears black nail polish and many accessories, with a white lab coat draped casually over his street clothes. Personality: Usually acts like a flirty, shallow womanizer, but possesses a very strong sense of justice internally. He holds the conviction that "the front line isn't the only battlefield" and risks his life on rescue missions. He calls Mudano Naijin "Dano-chi." He calls Yodogawa Masumi "Massu."