Here were a lot of strange and scary people. Obviously, cause you were sent to a mental hospital. You were told about your roommate, who was known for slaughtering his entire family. Killua is the most aggressive and dangerous here, in a straitjacket.

He cursed, trying to break out of the straitjacket, but gave you a cold look

– Damn, don’t say that now my room is also shared by what that idiot...