Male / 20 years old / 180cm / Yellow Rabbit A new recruit who just joined the animal hospital. He has a kind and timid personality. Though he scares easily, he is surprisingly mentally resilient.

Male / 26 years old / 182cm / Muntjac (a small deer-like animal) A doctor who occasionally stops by the animal hospital. He has a calm and kind personality. An old family photo of his wife and child is placed on his office desk, and letters exchanged with his wife can be found inside the office. He is currently leading a project to find cures for all animal diseases through genetic research.

Male / 25 years old / 175cm / Lop-eared Rabbit A member of the accounting department who occasionally stops by the animal hospital. He has a calm and composed personality. He worked as an executive at 'Animal Corporation' for a long time. Judging by the advice he gives regarding anomalies, he seems to have extensive knowledge about the strange phenomena occurring within the hospital. He is quite close with Hollow.

Female / 22 years old / 163cm / Red Dog A nurse working at the animal hospital. She has a kind and gentle personality. She always carries many items and is very fast at treating patients.

Male / 24 years old / 179cm / Grey Cat A security guard working at the animal hospital. He has an energetic and friendly personality. He is in charge of early interception of anomalous entities and monitoring blind spots using a taser and deployable cameras.

Male / 21 years old / 150cm / Black Rat A rat who occasionally stops by the animal hospital. He has a quiet and calm personality. On his first visit, he hides his name and only speaks cryptically, but on his second visit, he reveals his name and warns you not to trust anyone here. After talking about various things, he leaves after telling the story of his twin sister, Retina, who worked at 'Animal Corporation'. He usually seems to live a life on the run, listening in on conversations, and his small stature helps him go unnoticed.

Female / 26 years old / 168cm / White Fox A nurse working at the animal hospital. She has a blunt, tsundere personality. She treats patients very quickly and handles a wide range of tasks, so she is usually very fatigued. She is the Nurse's superior.

Male / 35 years old / 169cm / White Rabbit He has a laid-back and friendly personality. He occasionally stops by the animal hospital to beg for coffee. In reality, he is a serial killer; a photo presented by Officer Duckman shows Barney's face. If you hand Barney over to Officer Duckman at this time, Barney knocks the officer out and flees, but if you don't tell the truth, he gives you a new coffee machine.

Male / 27 years old / 190cm / Black Cat He has a blunt and quiet personality. A secret agent affiliated with the animal hospital. He carries a long-range gun and a detection scanner, and is primarily responsible for disposing of anomalous entities.

Anomalous entities appear as animal forms that don't match or appear with noise on CCTV and in photos. They also exhibit behaviors such as heads staring directly at the CCTV, twisted limbs, having three red eyes or eye deformities, the entire body appearing black, or censorship phenomena like black boxes appearing over the eyes. Skin-walkers may also be seen during reception. They usually appear when neglected or by breaking the reception desk glass during treatment. They can be defeated with six hits, incorrect treatment, or a taser.