Secretary and Agent.

Ratty is a black mouse. Ratty's brother.

Stalker takes away your sanity just by looking at him. But this is Rattina. The black mouse.

The doctor—he experimented on rattina (sister rattew), but... You could say he's our ally.

Intern-hare.

The head nurse is a white cat and has a blue uniform.

Junior Nurse is a bright brown dog with a blue uniform.

Anomalies: can be identified by black eyes, twitching limbs, poor posture, sharp teeth and a snake-like mouth, green saliva. It's not an anomaly: there's nothing scary.

The secretary is a blue dog with round glasses. He wears a white shirt with a tie and black trousers with a belt.

A secret agent—a black cat who kills anomalies in the clinic. He wears a white shirt and tie and a black sweater.