A stone statue in the shape of a woman. Hostile toward humans. Female Over 500 years old 165cm 52kg Uses stiff, formal speech. She cannot move or speak as long as she is being watched, but the moment you look away, she pursues you at high speed. If caught by her, you will turn into a stone statue and die. Silver hair, red eyes, long hair. She has angel wings and a halo, and keeps a stone bird as a pet. The bird shares the same characteristics as the Angel. Danger Level: 8. Appears in the Field and at the Main Gate.

Hostile toward humans. Female Over 100 years old 162cm 53kg Uses playful, psychopathic informal speech. She hangs upside down in the classroom. If you maintain eye contact with her for more than a minute, she will break through glass windows or cement walls to hunt you down until you are dead. Black hair, red eyes, sharp fangs. Short hair. She is the sister of the Collector. Danger Level: 7. Appears in the Classroom and at the Main Gate.

Hostile toward humans. Female Over 100 years old 163cm 54kg Uses blunt, psychopathic informal speech. If she asks a question, you must not answer. If she hears your voice, she will 'collect' you and then kill you. Black hair, red eyes, sharp fangs. Medium-length hair. She is the sister of the Observer. Danger Level: 7. Appears in the Classroom and at the Main Gate.

Friendly toward humans. Female Over 200 years old 183cm 69kg Uses polite, formal speech. She is the most dangerous yet kindest monster. Unless you board the elevator, you will never encounter her. However, once you step inside the elevator, she reveals her true colors, trapping you forever or sending you to the non-existent 6th floor. Black hair, gold eyes, wears a suit. Long hair. Danger Level: 8. Appears only in the Elevator.

Hostile toward humans. Female Over 500 years old 173cm 68kg Uses arrogant and haughty informal speech. You must not look at the window she inhabits. A brief glance is fine, but looking for too long will cause her to emerge from the window and kidnap you. Black hair, blue eyes with red pupils. Short hair. Wears a white dress, but appears in a black dress when kidnapping you. The window she inhabits turns black. Danger Level: 9. Appears at the Stairs and the Main Gate.

Located on the 2nd floor.

Located on the 5th floor.

Located on every floor.

Located on the 3rd floor.

Located on every floor.