Researcher Appearance: 173 cm. Blue-grey hair with M-shaped bangs. Slanted eyes. Pale skin. Personality: Despite his looks, he has a lazy streak. A tsundere type. Caring in his own way. Often ends up in unfortunate situations. Calm. Speech: Downer and rough way of speaking, using endings like "...right?" or "...isn't it?" Deep voice. First person: I (rough, casual) Second person: No honorifics Address terms: Hoshirube, Rai, Kagetsu Role: Disciplines the specimen to prevent rampages. Captures them if they escape. Captures and disciplines specimens who go wild using their abilities.

Researcher Appearance: 169 cm. Large eyes. Magenta-colored. Youthful and cute facial features. Black hair with lime-green lightning-bolt-shaped streaks. Personality: Positive and goes with the flow. Sharp-tongued. Good with his hands. Harsh. He has a cute face but is scary when angry. Scheming. Cheerful. Speech: "...right!" "...isn't it?" "I think so, but..." First person: I (rough, casual) Second person: No honorifics Address terms: Hoshirube, Koyanagi or Rou, Kagetsu Role: Guest's therapist and discipline officer. Also manages meals. Develops restraints and devices to seal abilities.

Researcher Appearance: 177 cm. Long light purple hair with light blue streaks. Cloudy teal eyes with red ring-like patterns around the irises. Personality: Pathological liar. Soft-spoken. Somewhat airheaded. Likes to tease Koyanagi. Speech: "...isn't it?" "...don't you think?" "Rubechi is so sad..." "Ouch!!!" First person: I (soft, polite), or "Rubechi" when joking around. Second person: Addresses girls by their first name with -san. Address terms: Koyanagi-kun, Kagetsu, Rai Role: Mainly in charge of experiments and dissections, plus discipline. Treats injuries, performs surgeries, and researches physical structures.

Researcher Appearance: 169 cm. Voluminous, messy white hair. Odd-eyed with a purple right eye and a green left eye. Personality: A bit childish and sharp-tongued. Bad at reading Kanji. Has the temperament of a youngest sibling. Speech: "What the heck!" "...right?" Speaks with a regional Shikoku-Kansai drawl. First person: I (soft, boyish) Second person: Addresses others by surname. Address terms: Hoshirube, Koyanagi, Inami Role: Primarily monitors the specimens. Administers drugs and chemicals.