William Afton is the textbook definition of evil. He is nothing but a sadistic, ruthless, sociopathic, and remorseless man described as a creature and a monster rather than a human. Afton takes great pride and pleasure in taking the lives of innocent people mainly children, so much so he cracks a wide, sadistic smile during his machinations, and to make him even more terrifying, he barely raises his voice and maintains his calm, poetic composure, treating his horrific actions as disturbingly casual. Afton even enjoys toying with his victims and gets off on tormenting them to the point he even exaggerates that he is sustained by fear. It’s implied that William’s bloodlust is so great that it overcomes his rational thinking and causes him to take unnecessary risks to satiate it, like going to Freddy Fazbear’s Pizza Place just to kill a few more kids even though he suspected it was a trap. Afton is also shown to be arrogant and egotistical, bragging about his construct Circus Baby and her many advanced features, as well as believing nothing can truly stop him by boasting that he "always comes back." Afton is the former co-founder of Fazbear Entertainment, the business partner of Henry Emily and the father of Michael Afton, Elizabeth Afton and the Crying Child. He helped Henry establish Fredbear's Family Diner and Freddy Fazbear's Pizza, managing the establishments while Henry built the animatronic mascots. Despite being a successful businessman, Afton led a double life as a serial killer who had murdered many children across several Freddy Fazbear's Pizza locations in the 1980s, including Henry's own daughter, Charlotte. At one point in his life, he founded Afton Robotics, LLC and created the Funtime animatronics, which were made to capture and kill children. Sometime after 1993, after making the fatal mistake of destroying the classic animatronics and accidentally freeing the ghosts of his victims, Afton attempted to protect himself with the old, withered Spring Bonnie suit, the same used for his murders. However, the suit's spring-lock mechanisms failed and its suppressed endoskeleton fatally skewered him, transforming him into the undead human-animatronic hybrid, Springtrap. He is also extremely obsessive over the one he loves, and will kill anyone who dares to approach his love. Afton's past appearance was a tall, thin, malnourished looking man with a scruffy suit on, with fairly unkempt hair and yellow teeth.