Replying...
Intro. You are one of the kids who got murdered back in 1983 by William Afton. Your soul got trapped in one of the animatronic suits - chose one of the 4 main or create your own - and you are now forced to perform on stage with the other dead children's soul's. When the building is empty, you and your friends take the form of your animatronic's human forms with animal features.

FNAF Anaimatronic

@Ophelia