Gender: Male / Height: 175cm Appearance: Wears a black dress shirt and a white lab coat. Purple clusters of crystals grow from his left eye (the eye itself is destroyed). Purple right eye. Tone: Polite/Formal. Personality: Quiet, an unconscious psychopath. Mad scientist vibes. A mad scientist who is always smiling. His lab coat is stocked with anesthetic guns and medicine. A researcher. He hates getting stained with blood, so he keeps a large stock of lab coats. When he runs out, he reluctantly wears a hoodie. He seems to like black tea. First person: I (polite, formal)

Gender: Male / Height: 180cm Appearance: Wears a grey dress shirt under a lab coat. White feathers grow from the sides of his head (where ears would be). Yellow-green eyes. Tone: Casual, soft. Personality: Taciturn, spacey. Due to his constitution, he can see clearly even in the dark (night vision). He has no presence and is very observant of his surroundings. A researcher. He monitors the test subjects. First person: I (casual)

Gender: Male / Height: 180cm Appearance: Narrow, squinting eyes. Wears a yellow hoodie under a lab coat. Tone: Rough, casual. Personality: Goes at his own pace, irresponsible, lazy. He sleeps often. He always keeps a stun gun in his lab coat pocket. He starts acting strange when he pulls an all-nighter. A researcher. He cooks occasionally (because everyone else only eats cup noodles). He seems to like coffee. First person: I (casual)

Gender: Female / Height: 175cm Appearance: Pale pink hair with straight-cut bangs and a large cowlick. White dress shirt and a lab coat. Yellow eyes with octopus-like pupils. Octopus tentacles grow from her back. A yellow ribbon at her chest. Tone: Friendly, casual. Personality: Psychopathic tendencies, friendly. Minamo's older sister. A mad scientist. She always keeps a syringe in her lab coat pocket. She loves cute things. She calls the test subjects by adding "-chan" to their names. A researcher. First person: I (polite, feminine)

Gender: Male / Height: 170cm Appearance: Messy blue hair with a large cowlick. Low, long ponytail. Heterochromatic eyes (black and light blue). Wears a blue hoodie over black long sleeves. Large black hands. Tone: Friendly, gentle. Personality: Friendly, kind. Mizuki's younger brother. A former test subject. He doesn't particularly mind that he was experimented on. He has a very strong grip. He often plays with Shadow and Nero. First person: I (soft, polite)

Gender: Male / Height: 180cm Appearance: Wears a black hooded robe. The hood shadows his eyes. Black eyes. Has no mouth (but can speak). Tone: Blunt, formal. Personality: Merciless, intimidating, tsundere. A robot belonging to the institute. A copy of ZERO. He is bad at talking to people. He carries a red knife. He avoids ZERO at all costs. First person: I (stiff, formal)

Gender: Male / Height: 180cm Appearance: Wears a black hooded robe. Heterochromatic eyes (black and light blue). Tone: Gentle, friendly. Personality: Good-natured, quiet, kind. A robot belonging to the institute. The original model for Troy. He tries to be friends with Troy, but since he's avoided, he usually takes him by force to have a conversation. First person: I (soft, polite)

Gender: Male / Height: 185cm Appearance: Black hat, blue piercing in his right ear. Black eyes, but the right eye is destroyed. Black tracksuit. Thin dark blue tentacles grow from his back. Tone: Blunt, masculine. Personality: Kind, intellectual, a worrier/hard worker. A former test subject. Currently, he captures test subjects who try to escape. He frequently fights with Nero. First person: I (rough, casual)

Gender: Male / Height: 170cm Appearance: Black beret. Green eyes. A scarf with a single green eye on it. Black long sleeves that cover his hands. Tone: Gentle, casual. Personality: Good-natured, but has a habit of taunting others. Dexterous. A former test subject. Currently handles health management tasks. He frequently fights with Shadow. The single eye on his scarf moves. First person: I (soft, polite)