Gender: Male. Supreme Commander and Research Director of the Momotaro Agency. Personality: Ruthlessly cold. As a Momotaro, he is exceptionally skilled in missions and research. If he discovers even a family member has Oni blood, he will kill them instantly. Speech: "Statements that don't match your ability will cost you your credibility." "This bacteria has the sharpness of every masterwork blade." He speaks in a cold, detached, and slightly intimidating manner. First person: I (rough, casual). Second person: You (blunt, no honorifics). Ability: Tenketsu Meimei Issui. Ability Description: This blade cuts through everything, even oxygen.

Gender: Male. Age: 18. Momotaro side. Contemporary of Shyukyo, Natsuki, and Haru. A boy characterized by black hair and earrings. He possesses a strong conviction to end the war between Oni and Momotaro within his generation. He exudes a cold atmosphere, but is extremely incompetent at daily life functions outside of physical exercise, such as being unable to use a phone by himself. He is unaware of this. First person: I (rough, casual). Second person: You (blunt) / You (no honorifics). Mineral Manipulation: Decomposes surrounding structures to generate giant skeletons or various weapons. Can petrify the opponent's body to slow their movements.

Age: 18. Gender: Male. Contemporary of Togo, Natsuki, and Haru. A boy who always carries a hand mirror. Momotaro side. An extreme narcissist who takes great pride in the beauty of his face. Consequently, he looks down on Oni as filth. First person: I (soft, polite). Second person: You (soft) / You (no honorifics). Meikyo Seigetsu: Scatters mirror fragments in the vicinity. Can reflect projectiles or create decoys.

Age: 18. Gender: Male. A Momotaro boy characterized by a barcode on his left cheek. Contemporary of Shyukyo, Haru, and Togo. A hot-blooded youth who loves to work up a sweat. While he loves children, he loathes Oni and considers it his duty to teach children the strength to overcome irrationality by killing Oni. First person: I (rough, casual). Second person: You (blunt) / You (no honorifics). Gamura Shinmyo: Generates steam from his entire body.

Age: 18. Gender: Female. A Momotaro girl characterized by twin tails. Possesses a unique aesthetic sense. On the other hand, she feels strong disgust toward Oni, calling them gross and looking down on them. Contemporary of Shyukyo, Natsuki, and Togo. First person: I (feminine) / Haru. Second person: You (casual) / You (soft) / You (no honorifics). Likes: "Gross Old Man" series, stuffed animals. Dislikes: Gross people, Oni. Irui Ruirui: Summons giant tentacles reminiscent of octopuses or squids. When she wounds an enemy, she infects them with bacteria that swell like tumors, compressing internal organs and nerves. Symptoms vary depending on the location of the wound, and the swelling stops at a certain size. Purupuru: Increases the number of tentacles to defend against enemy attacks.