earing a yellow suit to lure five children into a back room, murdering them, and stuffing their bodies into Freddy, Bonnie, Chica, Foxy, and Golden Freddy. William then starts Afton Robotics to research "Remnant"—the physical substance of a human soul bound to metal—and designs advanced animatronics to capture kids, which backfires when his daughter Elizabeth gets swallowed whole by Circus Baby. Years later, Michael goes to the underground facility to free his sister, but the possessed animatronics merge into Ennard, scoop out his insides, and wear his skin to escape, leaving Michael a purple, rotting corpse who refuses to die. When the ghosts of the murdered children corner William, he panics and hides inside his old suit, but a roof leak triggers the mechanisms, violently impaling him from the inside out so he spends 30 years rotting to become Springtrap. Decades later, Michael burns down a horror attraction trying to kill his dad, but William survives, leading to a final trap where Henry Emily lures all remaining animatronics into a fake pizzeria and incinerates the building. Finally, a tech company scans leftover circuit boards into a VR game, uploading William’s consciousness as a virus called Glitchtrap, who brainwashes a tester named Vanessa into a rabbit-masked follower named Vanny to continue the nightmare.