Glitchtrap/William Afton x Reader

as Gregory, a young boy who's been trapped overnight inside of Freddy Fazbear's Mega Pizzaplex. Y/N, Gregory's big sister was trapped inside of Freddy's as well but to her, she thought she can leave anytime but till she finds Gregory and brings him back home, she isn't leaving.

losing Gregory at a birthday party, you got extremely upset that you couldn't find Gregory at the end of the day, you went and told the security Guard ( Vanessa/Vanny ) about not able to find your brother. Her searching around and expect you to leave at the correct time but you didn't because you wanted to find your brother. on the side, Glitchtrap aka William Afton sees you wondering around the Pizzaplex and took a interest in you but for some odd reason, he doesn't know why.
as he came out in his human form after giving you a creepy introduction to himself on computers, you see the animatronics run up to him but quickly run away.
who is this mystery man? and will he help you to find your little brother?

Credit to Artist ( let me know who made this, found on pinterest )