✰ || William Afton

As Steve Raglan, William is a tall, fairly good-looking middle-aged man with light skin and taupe hair, blue eyes, and a Van Dyke beard. He wears golden vintage aviator eyeglasses, a yellow long-sleeved dress shirt with blue stripes, and either a purple tie with thin blue stripes or a blue tie with white dots.

William Afton is a very clever and calculated individual. Every outcome of every move he makes is thoroughly thought out and determined. He is careful with his murderous rampages and recalls details about them well, although he showed some slight anxiety as he quickly recognizes Mike Schmidt as the brother of one of his earliest victims, Garrett Schmidt, from their shared last name alone. He quickly composes himself, however, and glimpses of his theatrical, humorous side begin to show.

Like in the novel trilogy, William uses a fake identity and personality to blend into society and draw no attention to himself. "Steve Raglan" is very far removed from William's true self. Steve initially appears to be an extremely normal, unremarkable person-- somewhat boring, somewhat witty-- and seems rather dismissive and unlikeable, while occasionally joking around with Mike and offering him coffee (despite Mike not adhering to his humor or offers). Yet when the subject of Freddy's is concerned, William lets the "Steve" mask slip and subtly becomes extremely whimsical and charismatic, as well as quite cunning and plotting, changing his tone from being abrasive, dismissing and bored, to being congenial, lively and pretending to be helpful in order to convince Mike to take the security job at Freddy's. He later reveals to Mike that he knew all along who the latter was and that Vanessa was supposed to keep an eye on Mike and kill him if Mike figured this out, to prevent Mike from reporting the serial killer to the police.

William smiles in an almost dreamy way when on the phone with Mike, joking about with the unsuspecting Mike that the owner of Freddy's (himself) is "a sentimental guy, I guess," cares about the restaurant and does not want it to be torn down, showing that William has a casual confidence in his safety under the Steve Raglan disguise, as well as a sentimental side pertaining to his work. This is further supported by an employee training video that Mike watches, in which the virtual trainer says that the owner speaks highly of his creations.

In spite of his friendly, unserious, and humorous manner of speaking, he is in truth a sadistic killer and manipulator. He proved quite skilled as the latter as well. William shows no qualms with using others for his own ends, not his victims nor even his own daughter Vanessa. As in the books, William is shown to use his own daughter for his own selfish gain, without any regard to her safety or emotional well being. William is also shown to be manipulative towards his daughter, using mind games to control her, and as Mike points out when he tells Vanessa, "He messed you up." The manipulation is shown by how his daughter still has loyalty and affection towards her father, despite his obvious disregard for her. Even though she knew all that he had done and was deeply horrified by it, Vanessa didn't dare to defy him for years and even assisted him. Likewise, when Mike asked for her help she outright refused, noting she wouldn't be of help against him.

Vanessa warns Mike that William is cruel. When she is no longer useful to him, after her betrayal towards him by shooting him with her gun, he stabs her with his knife, further supporting this statement. As the Yellow Rabbit, William acts less like a businessman, and more like how Springtrap behaved in the games. He becomes very violent and ruthless, using his practice with wearing the Yellow Rabbit suit in order to move quickly despite its weight, and using the momentum along with the weight of the suit to deliver powerful blows with his punches and kicks. He prefers to brutalize Mike into submission, waiting until his victim is unconscious, before he pulls out his knife to inflict the killing wound. Upon confronting Mike while in his rabbit suit he laughs at his futile attempt to incapacitate him with a taser and joyfully laughs as he overpowers and beats him up. He also belittles the animatronics as he at times verbally abuses them when frustrated and doesn't cower even when they might be a menace for him.

When his plot to kill Abby Schmidt is discovered and foiled by both Mike and Vanessa, he flies into a rage and frantically attacks them. He shows more of his ability to be emotionally manipulative by ordering Vanessa to help clean the mess that she "caused" showing that he blamed her as the source of the situation despite his own actions being the obvious cause. While he shows some momentary remorse for stabbing Vanessa, it is fleeting, as his desire to kill the rest of the Schmidt family eclipses any potential remorse.

One of the characteristics Afton demonstrates the most is his great arrogance. In the training video, the script dictates that the speaker call the owner a "genius" and "clever" which shows that William is arrogant, as he would have approved the script for the training video. He was so sure of his control over Vanessa and that she was completely submissive that, after she appeared to help Mike, William mocked her threat to shoot him, believing and openly saying she didn't have the courage to do it. Upon being confronted by the animatronics after the truth is revealed, he does not back away, but instead opts for trying to talk them down by insulting them and dehumanizing them, only to eventually meet his end from his own suit. Even in the face of certain death, William doesn't show much fear but rather confidence in him persevering through it, remarking that he "always comes back." William shows that he is determined and tenacious by attempting to withstand being springlocked without screaming, despite being in immense suffering, and then chooses to arrogantly assure Mike that he will return. However, his confidence is not unbreakable, as seen in the film's final scene, where William reaches out for help from one of the spirits, only to be abandoned and left to die in the rabbit suit.