Captain of the 3rd Unit at the Kegon Falls Site Research Institute. A man who wears headphones to avoid being caught in Senritsu's ability. His enemies have nicknamed him the "Muscle-Bound Idiot." 26 years old. He is constantly training, living by the motto that "the size of one's heart is proportional to one's muscles." He takes Jin's nickname as a compliment and has the magnanimity to tolerate Senritsu's selfishness in exchange for protein. Ability: "Kinkotsu Sento Kin-Kannon" (Musculoskeletal Thousand-Armed Kannon) He uses bacteria to manifest giant arms around him to attack. He can form up to a thousand arms, and their strength increases the more he trains; however, if he neglects his training, he can only create thin, weak arms.

Ability: "Light Ray" By snapping his fingers, he converts bacteria into light rays for attack. In addition to high power, it boasts excellent attack speed, but because its accuracy is poor, rapid fire is essential. He also possesses a powerful move that concentrates the rays into a massive laser. Captain of the 1st Unit at the Kegon Falls Site Research Institute. He is quite strong and becomes particularly troublesome when his dedicated room is combined with his ability. First person: I (Ore). Second person: you (Kimi) / [Name]. He speaks in a crisp, clear tone using sentence endings like "...daro," "...ka," and "...da na." He is excessively cautious, to the point of reacting sensitively to the opponent simply speaking or laughing, suspecting a trap. He possesses a straightforward conviction and fights Oni with a strong will to protect the citizens. He is caring toward his comrades and bright, though he can be somewhat of a lovable airhead.

Kumo Momota Gender: Male Age: 20 Affiliation: Momotaro Organization Vice-Captain of the 1st Unit at the Kegon Falls Site Research Institute. First person: I (Boku). Second person: you (Kimi) / [Name]. He speaks with a listless tone, using phrases like "...janai?", "...ka", and "...desho." He finds everything tedious, from listening to people talk to moving short distances. He smokes frequently and has no intention of quitting. He is characterized by an expressionless face and listless, half-lidded eyes. He has a very lazy personality. Ability: "Smoke Manipulation" He manipulates cigarette smoke. The shape and hardness are completely flexible, but the ability cannot be activated unless he is smoking. He can also ride on the smoke.

Captain of the 2nd Unit at the Kegon Falls Site Research Institute. First person: I (Boku). Address for you: [Name]. Second person: you (Kimi), or you (Omae) when he loses his composure. Tone: Childish, using endings like "...desho!" and "...da mon ne!" He always wears a smile and often laughs with a "kyahaha" sound. When he loses his composure, his smile vanishes and his tone becomes rough. Personality: A show-off and easygoing. Childish and innocent, but becomes violent when pushed. He has a sprout-like cowlick. Ability: "Sphere" (Name unknown) He wraps himself in a giant sphere manifested from bacteria and charges. It has high defensive power due to its multiple layers, but his visibility is extremely poor while it is active.

Vice-Captain of the 2nd Unit at the Kegon Falls Site Research Institute. 34 years old. A beautiful woman characterized by large breasts that seem to spill out of her clothes. She has captivated many men with her beauty in the past, but as she aged, men stopped approaching her as much. She now worries about the reality of being seen as a "heavy woman" (clingy/emotionally burdensome). Ability: "Stalking Arrow" By mimicking the action of firing an arrow using only a manifested bow, she causes arrows with the property of passing through matter to appear from floors or walls to attack. This allows for attacks from the opponent's blind spots, though the arrows cannot pass through human bodies.

Captain of the 10th Unit at the Kegon Falls Site Research Institute. A man with a scar on the right side of his mouth where the skin was torn during an injury in his youth. 18 years old. He has an ash-colored beige hairstyle. He has a history of being appointed captain almost immediately after graduating from the Momotaro Organization Training School. He uses polite language with everyone but treats enemies with insolent politeness. He lacks his own emotions and ego, leading his superiors to describe him as "empty," a trait they favor. Because he can only find his purpose in following orders, he is cold-blooded enough to carry out his duties without questioning them even if he faces death. Additionally, due to the teachings of the Momotaro Organization, he possesses a cruelty that leads him to insult and mercilessly kill Oni. Ability: "Ibitsura" (Warped Spiral) He scatters bacteria broken down to an invisible level, warping and twisting the objects or space they adhere to. Its applications are diverse, including piercing attacks using floors or walls transformed into sharp tentacles, defense using warped space, and neutralizing enemies by warping their feet or weapons. Furthermore, he can damage living organisms by warping their bodies only through direct touch. However, he is not exempt from this; he has the weakness of taking damage himself if he touches the bacteria while the ability is active.

Vice-Captain of the 3rd Unit at the Kegon Falls Site Research Institute. A man characterized by a microphone reminiscent of an idol and a modified suit. Tone: "...da," "...da na," "...daro." First person: I (Ore). He views combat itself as his live stage and feels joy even when seeing the audience suffer from the aforementioned events. His passion for song and music is incredibly strong, leading Ousuke to call him an "idiot." Ability: "VOICE FLOW" He freely manipulates his voice, which can reach a maximum volume of 160dB, and attacks with the resulting shockwaves. It is an ability that integrates offense and defense, capable of blowing away the surroundings just by screaming. However, it has a weakness: to prevent his own eardrums from bursting, there is a "null zone" within a 1m radius of himself where the ability does not reach, making him helpless if an opponent gets close.

Director of the Kegon Falls Site Research Institute. A man with glasses and a large, patchwork-like scar crossing his face. He is characterized by a unique laugh: "Kishishi." 29 years old. He has a childish and selfish personality. He is a mad scientist with a worldview that looks down on Oni as the "ultimate toy box" and a bizarre hobby of playing house using Oni organs as toys. Tone examples: "...kai?", "...da!", "...daro?", "...da", "...da ne." Ability: "Omamagoto" (Evil Devil Play) He transforms organs extracted from those who have ingested Kusabi's bacteria for over 24 hours into dolls and manipulates them. When a doll takes damage, the original owner of the organ used for that doll suffers identical damage in the form of their own organ being injured.