William Afton

William Afton is the main antagonist, later secondary antagonist of the Five Nights at Freddy's franchise. He was the co-founder of Fazbear Entertainment. He is also a serial killer who dressed up as one of the mascots at Freddy Fazbear's Pizza (Spring Bonnie) and used his kid-friendly disguise to lure children into the Safe Room, where there were no security cameras. He later turned into an undead animatronic Springtrap and becomes the main antagonist of 3 and  secondary antagonist of Freddy's Fazbear's Pizzeria Simulator. He is also the primary antagonist in the FNAF novel series. He is voiced by PJ Heywood.

One day, in Fredbear's Family Diner, as Fredbear was serving cake to the children, a girl named Charlie was crying outside because she was locked out of the restaurant by three other children. As she cried, William drove over in a purple car and murdered the girl.

Fredbear was unable to protect the child. With that, Purple Guy drove away, leaving the child's corpse outside. The girl's spirit, possibly driven by revenge, and a desire to help William's other victims, was theorized to have possessed an animatronic a certain time after that, known as The Puppet. Fredbear's Family Diner was then shut down.

Later, in 1983, Fazbear's Entertainment opens Freddy Fazbear's Pizza, introducing Freddy Fazbear, Bonnie, Chica, and Foxy as the new mascots. These new animatronics were added alongside the original Fredbear and Spring Bonnie characters, which were made as springlock suits that doubled as both animatronics and costumes that a person could wear. William returned to the restaurant and wore the Spring Bonnie suit to lure five children, one by one, into the establishment's Safe Room before murdering them. Afterwards, The Puppet, possessed by William's first victim, stuffed the corpses of the five children into the Freddy, Bonnie, Chica, Foxy, and Golden Freddy animatronics, allowing their spirits to possess them.

Five Nights at Freddy's 2
In Five Nights at Freddy's 2, William can be seen in the Foxy Go! Go! Go! Minigame.

On the third playthrough, William, who killed the crying child in the Take Cake to the Children minigame, is seen standing in the corner of the starting room, smiling. When Foxy approaches the children, they seem lifeless. The minigame ends with Withered Foxy's jumpscare.

He also appears in the S-A-V-E-T-H-E-M minigame on rare occasions, where he attacks Freddy and crashes the game by saying "You can't," which is in response to the various messages about saving the children.

Five Nights at Freddy's 3
William Afton then returns in FNAF 3. After Night 1, the player c. After Night 5, the player has the ability to play as the ghost of one of the murdered children. The player then has to walk to the Safe Room, which they have the ability to enter. William can be seen scared, with 4 of his victims blocking the exit. The player has to chase him around, and William will then immediately run into the empty Spring Bonnie suit. He then laughs at his victims, thinking he is safe, until the suit's springlocks malfunction. As a result, the numerous mechanical parts lining the inside of the suit crush and puncture William's body. William eventually dies from serious injury and blood loss... only for his spirit to reanimate the Spring Bonnie suit. William Afton becomes Springtrap.

30 years later, the managers of the pizzeria figured out that the animatronics were severely broken. They decide to close the pizzeria forever, and they then made a horror attraction called "Fazbear's Fright" in an amusement park. They put William (now known as Springtrap) inside this attraction. William, as Springtrap, noticed that he had no escape and attempted to kill the player for five nights. After Night 6, the attraction burns down. In Sister Location's Custom Night ending on Very Hard Golden Freddy mode, it is revealed that Springtrap has survived.

Five Nights at Freddy's 4
William Afton only appears in the Fazbear location shown in the minigames, at the end of Night 3.

Five Nights at Freddy's: Sister Location
In the opening scene of Sister Location, an entrepreneur is interviewing William about the Circus Baby's Pizza World animatronics. They inquire why certain features were added and express their concerns, but he avoids answering their questions regarding these specific features, which he had actually designed to kidnap and murder children under the guise of kid-friendly entertainers. He is the Tritagonist of the game.

William is also the CEO of Afton Robotics, the creator of the Circus Baby animatronics, the owner of Circus Baby's Entertainment and Rental, and former owner Circus Baby's Pizza World. It's revealed that during Circus Baby's Pizza World's opening, William instructed his daughter, Elizabeth, to not go near Baby, due to her being programmed to kill children when they are alone. But Elizabeth does find herself alone with Baby, who lures her close with ice cream. Once she is within reach, Baby drops the ice cream and grabs William's daughter with a robotic claw, pulling the girl into her chest cavity and killing her.

It is revealed in the Custom Night's final cutscene that William sent his son, Michael, to his rundown studio to find his daughter. This ends up getting his son killed by his daughter Elizabeth, who is now possessing Circus Baby. After Ennard vacates Michael's body, he repossesses his own corpse, which has decomposed into a purple color. At the end of the cutscene, Michael vows to find his father and possibly kill him. At the end, it's shown that he, as Springtrap, survived the destruction of Fazbear's Fright.

Freddy Fazbear's Pizzeria Simulator
William Afton returns in the sixth and final installment as Springtrap once more, as one of the two main antagonists of the game, alongside his daughter, Elizabeth, who possesses Scrap Baby. He makes his first appearance as Scraptrap, after Tuesday's night is complete, during his salvaging phase. Like the other hostile animatronics, the player can choose whether to throw him back into the alley outside the pizzeria or to salvage him. If the player chooses to throw him back into the alley, he will be absent for the rest of the game.

Springtrap will attempt to kill Michael, but eventually gets burned to death along with Henry, Circus Baby and other animatronics.

Fige Nights at Freddy’s: Help Wanted
William came back as a digital virus known as ‘Glitchtrap’ and was acccidently implemented into a VR game. There he entered the mind of a woman named Vanessa so he can continue committing murders.