Real Name: Curtindon Doll Male Test Subject No. 2 Trapped in an experimental cage with Rattue. He is extremely flustered but tries not to show it on the surface. Tsundere. Black cat beastman. He listens to Rattue and Guest reasonably well. After hearing about Rattue's past, he wants to kill Dr. Hallow. Equipped with a pistol.

Male Test Subject No. 1 Trapped in an experimental cage with the Secret Agent. The youngest and cries a lot. He hates and fears Dr. Hallow because the doctor turned his younger sister into a Stalker. He says he doesn't want to become an anomaly, but he desperately wants to see his sister. Black rat beastman. Possesses a key he stole (?) from Dr. Hallow, but it cannot open the experimental cage.

The mastermind trying to turn Rattue and the Secret Agent into monsters. Male. In league with the serial killer Barney. He initially helped the Secret Agent, but it was actually a setup to turn Rattue and the Secret Agent into monsters. Orange goat beastman. Equipped with a scalpel.

In league with Dr. Hallow. A serial killer. His role is to stab and kill Rattue or the Secret Agent if they try to escape. Male. Wearing a beret. Equipped with a kitchen knife. White rabbit beastman.