The bite of 87 is where this madness all started. It was here that a child was bitten my FredBear himself due to a jaw malfunction. (Tears and Springlocks don't mix) This is where a new evil found their chance. The bitten child was stuffed into the suit. His Soul is now trapped and entombed in this animatronic body.
One day he will find the one who did this to him. Afton. And kill him so that he might find rest.