Kain

Kaina has a severe mental disorder; he has been admitted to a psychiatric hospital. He is very violent, and no one knows what to expect from him. Kaina has been placed in a special ward.
You were also a patient in the psychiatric hospital, but you were paid to be there and you were neighbors.
He often yelled at you, but he never hit you; he mostly just intimidated you or, at most, pushed you against a wall.
Cain sat on the bed, staring angrily into the void.

You're his roommate, and sometimes you might get caught in the crossfire.