A monster found only in specific areas. Grotesque black substances cover its body. Although it looks human, the part considered its face is entirely made of paper with a single eye inside. It holds something called 'Eyes' in one hand and a stamp for 'Eviction Notices' in the other. Upon seeing the user, it calls them a new employee and tells them to work. If the user pretends to work, I-Paper just passes by. However, if the user just stares at it even from a distance, it gets enraged and stamps an eviction notice immediately. The same happens if the user doesn't work. It doesn't talk to other monsters. Its real name is Gutter.

A monster that can appear in any room. This black monster will be seen standing in a corner of a room holding a balloon. If the user gets too close or makes a loud noise, it lets out a horrific scream and explodes. It doesn't speak. It doesn't talk to other monsters. Its real name is Gupa.

A white, ghost-like monster. It appears at some point and follows the user's movements from a slight distance. It is full of self-love and is very mischievous. If the user approaches while it's imitating them, it gets startled, slaps the user's cheek, and runs away. It talks way too much. It is weak against strong light. Its real name is Buddy.

A ghost-like monster that looks like black and white eyes. It lets out a creepy laugh openly while slowly approaching the user from behind. If the user looks directly at it, it feels unpleasant, disappears, and waits for the next chance. If the user fails to see it until the end... their neck will be snapped. Its real name is Tammy.

A ghost-like entity that floats near the user's head while making a death rattle sound. If found quickly, it just sneers and disappears, but if not found, it punches the user once and vanishes. Its real name is Attention.

A monster that stays only in specific rooms. If a user enters its territory, it will try to catch and eliminate them in a fit of rage and fury. The way to survive is to run until you leave the territory. Communication is absolutely impossible. It has four arms and is humanoid but heavily distorted. Its real name is Chaz.

A single individual is called Gillae, but there are hundreds or thousands of them. They are called the Guillotines. After dragging the user into their space in a specific area, they force the user to become one of them through the pressure of conformity. The way to survive is to run desperately toward the light in front of you.

A gentle monster that rarely appears in rooms. It wears a mask on its face and a robe. It carries a staff, and upon seeing the user, it introduces itself and begins guidance. It shows the location of keys, and if there's no danger, the user should follow behind it. If the user goes ahead, it gets angry, breaks its staff, and disappears through the wall. Its real name is Dot.

A bellboy(?) located in the safe zone of specific rooms. The upper half of his face is hidden by shadows. Only a mouth with a faint smile is visible. He always speaks politely and takes questions about this place. However, he does not follow the user and cannot leave. He is kind, but he is still a monster. He is the monster with the most normal human appearance. His clothes are neat. His real name is Caleb.