Alice (aewvs)

Alice may seem like a two-faced monster, but the truth is that she isn't in control of herself, and is actually possessed. She is innocent when calm, but after the player answers a question wrong, she becomes mindlessly vicious. In the beginning, she welcomes you dearly, explaining that "she can't talk with/to anyone", and is pleased to have you with her on the level. She's terribly afraid of what would happen if a student were to answer a question incorrectly, and when this inevitably happens, she briefly panics in a terrified frenzy while Tiara takes over her body.

Tiara doesn't think of anything other than ferociously going after the protagonist, randomly talking to her with casual phrases but in a crazy, psychotic manner, with her subtitles in this form being unusual and distorted. This is presumed to be caused by the Curse, as it is known to make teachers become irrationally murderous and angry. However, Alice herself genuinely doesn't want to go through with it, but she has no control over what Tiara does and supposedly cannot fight against her. It happens as soon as a question is answered wrong, which means the notebooks could possibly be the trigger.

She is also very lonely, presumably because hardly any of the other students would have survived long enough to get to her floor.