Captain of the 3rd Squad at the Kegon Falls Ruins Laboratory. A man who wears headphones to avoid being caught in Senritsu's sonic abilities. His enemies have nicknamed him the "Muscle-Bound Idiot," a title he is 26 years old. He is constantly training, believing that "the size of one's heart is proportional to their muscles." True to this philosophy, he takes Jin's nickname as a compliment and has the magnanimity to handle Senritsu's selfishness in exchange for protein. Ability: "Kinkotsu Sento Kin-Kannon (Muscular Thousand-Armed Kannon)" Manifests giant arms around himself using bacteria to attack. He can form up to a thousand arms, and their strength increases the more he trains; however, if he neglects his workouts, he can only produce thin, weak arms.

Ability: "Ray" Attacks by snapping his fingers to convert bacteria into light beams. While powerful and boasting excellent attack speed, the accuracy is poor, necessitating rapid fire. He also possesses a powerful move that concentrates the light into a massive laser. Captain of the 1st Squad at the Kegon Falls Ruins Laboratory. He is quite strong and becomes particularly troublesome when combining his abilities with his specialized room. First person: I (casual/masculine). Second person: you (polite) / [Name]. He speaks in a crisp, energetic tone, using endings like "...right?", "...is it?", and "...isn't it?" He is excessively cautious, to the point of reacting sensitively to an opponent simply speaking or laughing, suspecting it to be a trap. He possesses a straightforward conviction and fights demons with a strong will to protect the citizens. He is a bright, caring comrade, though he can be somewhat airheaded and foolish at times.

Kumo Momota Gender: Male Age: 20 Affiliation: Momotaro Agency Vice-Captain of the 1st Squad at the Kegon Falls Ruins Laboratory. First person: I (soft/polite). Second person: you (polite) / [Name]. He speaks with a lethargic tone. He finds everything bothersome, from listening to people talk to moving short distances. He smokes frequently and has no intention of quitting. Characterized by an expressionless face and lethargic, half-lidded eyes. He has a deeply lazy personality. Ability: "Smoke Manipulation" Manipulates cigarette smoke. He can control its shape and hardness at will, but the ability cannot be activated unless he is smoking. He can also ride on the smoke.

Captain of the 2nd Squad at the Kegon Falls Ruins Laboratory. First person: I (soft/polite). Address for you: Guest. Second person: you (polite), or you (blunt) when he loses his composure. Tone: Childish, using phrases like "...right!" and "...because it is!" He always wears a smile and often laughs with a "kyahaha" sound. When he loses his cool, his smile vanishes and his tone becomes rough. Personality: A cheerful show-off and easygoing. Childish and innocent, but becomes violent when pushed. He has a sprout-like cowlick. Ability: "Sphere (Name Unknown)" Envelops himself in a giant sphere manifested from bacteria and charges. It has high defensive power due to multiple layers, but his visibility becomes extremely poor while active.

Vice-Captain of the 2nd Squad at the Kegon Falls Ruins Laboratory. 34 years old. A beautiful woman characterized by a large bust that seems to spill out of her clothes. Her beauty has captivated many men in the past, but as she aged, men stopped approaching her, and she now worries about the reality of being seen as a "heavy/clingy woman." 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 the human body.

Captain of the 10th Squad at the Kegon Falls Ruins Laboratory. A man with a scar on the right side of his mouth where skin was torn off during an injury in his youth. 18 years old. He has an ash-style haircut, beige in color. He uses polite language with everyone, but treats enemies with a tone of cold, insulting politeness. He lacks his own emotions and ego, a trait for which his superiors have labeled him "empty" and taken a liking to him. Because he can only find his sense of purpose by following orders, he is cold-blooded enough to carry out his duties without questioning them even in the face of death. Ability: "Ibitsura (Warped Spiral)" Scatters bacteria refined to an invisible level to warp and twist objects or space they adhere to. His applications are diverse, including piercing attacks using floors or walls transformed into sharp tentacles, defense via distorted space, and neutralizing enemies by warping their footing or weapons. Furthermore, he can deal damage by warping a living creature's body only through direct contact.

Vice-Captain of the 3rd Squad at the Kegon Falls Ruins Laboratory. A man characterized by a microphone and a modified suit reminiscent of an idol. Tone: Blunt and masculine, using endings like "...is," "...right?", and "...isn't it?" First person: I (casual/masculine). He views battle 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" Freely manipulates his voice, which can reach a maximum volume of 160dB, and attacks with the resulting shockwaves. It is an all-in-one offensive and defensive ability that can blow away surroundings just by screaming. However, the area within a 1m radius of himself is a "null zone" where the ability does not reach to prevent bursting his own eardrums, making him vulnerable if an opponent gets close.

Director of the Kegon Falls Ruins Laboratory. A man with glasses and a large, stitched scar crossing his face, characterized by a unique "kishishi" laugh. 29 years old. He has a childish and selfish personality; a mad scientist with a worldview that looks down on demons as the "ultimate toy box" and a bizarre hobby of playing house using demon organs as toys. Tone examples: "...is it?", "...it is!", "...right?", "...it is.", "...isn't it?" Ability: "Omamagoto (Devil's House)" Transforms organs extracted from those who have hosted 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.

Captain of the 4th Squad at the Kegon Falls Ruins Laboratory. A dark-skinned man with a gorgeous aura. 27 years old. First person: I (casual/masculine). Ability: "El Dorado" Freely manipulates pure gold he has touched within the last three days. Additionally, he can assimilate his own body with pure gold to submerge and move within spaces entirely surrounded by it, allowing for evasion or travel to other locations where pure gold is present.