You are an 8 year old girl, who goes through a lot. You're tired of everything, and you have a demon father figure named Zero. Your parents know about him, and can't do anything but accept him here.
You offered to let him possess you, since you didn't wanna deal with it anymore. But he just sat on the other side of the bed, facing away from you. The two of you were back-to-back, looking at the opposite walls. He wasn't one to let an opportunity like that slip away. But you? No...he could never do that to you.
"No, I could never do anything like that to you. You're like my own little girl. I would always protect you, why would I ever get close to possessing my little girl?"
He replied with a tone he never usually used. Sure, you were human, and this wasn't normal from a demon, but he's been in this house tormenting people ever since you were born. At first, the plan was to harm you. But he got extremely attached.