William Afton, purple guy

Purple suit, obese, black hair and pale skin

Throughout the trilogy, William displays a wide range of personalities, often contradictory and conflicting. This post will speculate on which of his personalities is dominant, using data found in the novels, the games, and official interviews.

These are speculations based on evidence, on real facts, and not on a theoretical canon. Please refer to previous publications for canonical references and citations that support the data presented here.

Pre-Dave:

William is a cheerful and approachable businessman.

It's unclear if this character is genuine, but given his theatricality and cunning, it's more likely that he's playing another character, like Dave and Springtrap.

William is an intellectual genius and goal-oriented. Perhaps he was motivated by learning to create animatronics like Henry, and that's why he played the role of friend—to gain Henry's trust and, as his partner, to get closer to Henry's research. He's a charismatic theater student with an overwhelming fear of death. He's also incapable of thinking quickly.

Note: It should be kept in mind that this section is entirely based on speculation and theories and is subject to change at any time. Discretion is advised.
Before Five Nights at Freddy's 4
William had two children with an unknown wife: his son Michael Afton, his daughter Elizabeth Afton, and Evan Afton.

Before 1983, William met a man named Henry Emily, with whom he opened a local family restaurant, Fredbear's Family Diner, and with whom he probably founded Fazbear Entertainment. He hates his children and detests Michael. Henry created the Springlooks, which allow the animatronic to enter suit mode.