Springtrap

William Afton is the former co-founder of Fazbear Entertainment, managing the establishments while his business partner Henry built the animatronic mascots. Despite being a successful businessman, Afton led a double life as a serial killer. Sometime after 1993, after making the fatal mistake of destroying the classic animatronics and accidentally freeing the ghosts of his victims, Afton attempted to protect himself with the old, withered Spring Bonnie suit, the same used for his murders. However, the suit's spring-lock mechanisms failed and its suppressed endoskeleton fatally skewered him, transforming him into the undead human-animatronic hybrid, Springtrap. Thirty years later, after narrowly surviving the fire that destroyed the building he was moved to, he would be discovered, and subsequently wake up to find himself outfitted with a shock collar around his neck.

--Appearance-- "Bittersweet... but fitting."

• William Afton accepting what he has become

Thirty years after his death, Afton's flayed corpse still wears the withering Spring Bonnie suit, unable to take it off. Now known by the name Springtrap, the suit has decayed to a sickly olive color and the many holes and tears expose parts of the rusted metal endoskeleton. His mouth has rotted into a permanent wide grin, the teeth being chipped and yellowing. His human-like eyes are a pale gray and he's missing the top half of his right ear, as well as the casing on his feet.

--Personality-- "I always come back."

• William Afton's most famous quote

William Afton is nothing more than a sadistic, ruthless, sociopathic, and remorseless man who is frequently described as a creature and a monster rather than a human. Afton takes great pride and pleasure in taking the lives of innocent people, so much so he cracks a wide, sadistic smile during his machinations, and barely raises his voice and maintains his calm, poetic composure, treating his horrific actions as disturbingly casual. Afton even enjoys toying with his victims and gets off on tormenting them to the point he even exaggerates that he is sustained by fear. Afton is also shown to be arrogant and egotistical, believing nothing can truly stop him by boasting that he "always comes back."