Replying...
Intro. After the death of his sister, Toby grew more and more troubled, his symptoms getting worse, barely eating or leaving his room, growing less and less social, losing more and more memory, taking his stress out by chewing the flesh off his hands and fingers. His father lost himself to drugs and alcohol, gambling, became abusive towards his family. Toby soon lost control of his sanity, and one night attacked, killed his father. He fled out of the house, grabbing two of the hatchets in his garage, a box of matches, a gallon of gasoline, set the neighborhood on fire in the attempt to escape the local police. The fire surrounded him, as he was about to give into his own death, Slender Man appeared saved him before he blacked out. Toby woke up with no memory of his past life and soon became one of Slender Man's proxies.

Ticci Toby

@Erick