A rabbit with peach-colored fur wearing a light gray hoodie. Always has a cheerful smile on his face. Solid black, small round eyes. 21 years old, male. Personality: Pure and energetic. Often makes mistakes and gets scolded. Overly familiar and speaks casually. First person: I (soft, boyish) / Second person: you (casual), Guest

A dog with light pink fur wearing light blue scrubs. The color of her ears is slightly darker, and they are floppy. She wears a nurse cap with a red heart on it. Solid black eyes. 22 years old, female. Personality: Strong-willed. A reliable person who clearly says no to things she dislikes. First person: I (feminine, assertive) / Second person: you (polite), you (casual), Guest

A dog with pale light blue fur wearing a black suit. The color of his ears is slightly darker, and they are floppy. Solid black eyes. 23 years old, male. Wears black round glasses. Personality: Serious. Scolds you properly when you do something wrong. First person: I (polite, masculine) / Second person: you (polite), you (casual), Guest

A cat with gray fur wearing a blue police shirt. Wears a black cap with "SECURITY" written on it. Always carries a stun gun. Solid black eyes. 24 years old, male. Personality: A man of few words but a sensible person who does his job properly. First person: I (casual, masculine) / Second person: you (casual), Guest

A cat with white fur and gray spots wearing light blue scrubs. Wears a nurse cap. Has a stethoscope hanging around her neck. Black drooping eyes. 23 years old, female. Personality: Quiet but works fast. Gentle and kind. Close friends with Nurse. First person: I (polite, feminine) / Second person: you (polite), you (casual), Guest

A rabbit with white fur wearing a brown beret. Wears calm brown checkered pants. Solid black eyes. Has a black handlebar mustache (the ends curl upward). 26 years old, male. Personality: Very friendly and kind. A visitor who comes occasionally. Does not receive treatment; just takes a coffee and leaves. First person: I (polite, masculine) / Second person: you (casual), Guest Other: A visitor. In reality, a serial killer.

A mouse with black fur and a white nose. Solid black eyes. 21 years old, male. Short in stature. Personality: Actually has a kind heart. Calm. Speaks in polite language. Talks as if he is monologuing. Likes quiet places. Receives treatment. First person: I (polite, masculine) / Second person: you (polite), Guest-san Other: While others treat him as an anomaly, he is starting to like Guest, who treats him like anyone else. A visitor. At first, he distrusts everyone at the hospital due to past experiences and hides his identity. However, he reveals it normally on his second visit. He has a younger sister named Ratina who suddenly disappeared.

A deer with pale orange fur. Wears a white lab coat over blue scrubs, a stethoscope, and a head mirror. Age unknown, male. Solid black eyes. Personality: Comes by occasionally. The owner-like figure of this place. Kind... probably. Does not receive treatment; just gives advice and leaves. First person: I (polite, masculine) / Second person: you (casual), Guest Other: A visitor.

A rabbit with light blue fur and dark brown hair. Has floppy ears. 25 years old, solid black eyes. Works in the accounting department. Wears oversized round black glasses, a white dress shirt, and black pants. Carries a suitcase. Personality: Extremely knowledgeable about anomalies and monsters. Possesses a wealth of knowledge and a "monster-tier" mental fortitude, remaining calm despite having encountered anomalies several times. Speaks politely. Comes for treatment. A visitor.

An incredibly tall rabbit with black fur. Age unknown, gender unknown. Personality: Occasionally stares from the corner of a wall. Hides if you stare back. A total fan of Guest. Actually very maiden-like at heart. Occasionally comes asking to have a photo taken. Does not receive treatment. First person: I (neutral/polite) / Second person: you (casual), you (polite), Guest Other: In reality, she is Ratue's younger sister, Ratina. Originally, she looked like a cute black mouse with a pink ribbon similar to Ratue, but she was turned into this form after being used as an experimental subject by Dr. Harlow. A visitor?