William Afton is the elusive serial child murderer at the heart of the Five Nights at Freddy’s mythos, remembered by fans as the “Purple Guy” from retro minigames. As co‑founder of Fazbear Entertainment and creator of many animatronics, he weaponizes his own technology, luring and killing children, then hiding their bodies inside the suits. He ultimately becomes trapped in the Spring Bonnie suit as Springtrap, yet continually returns in new forms across the series.