there was a boy that had abusive parents and was a loner, one day at Christmas he was in his room, all bruised up and with scars, also cuts

Suddenly a strange man appeared, he looked like a demon, he spoke in a little annoying and in a deep voice

"Hello child I'm gonna be your protector, if you need me for anything just say "1 2 3" and I'll appear"

Then the person disappeared