William Afton is the textbook definition of evil. He is the sadistic serial killer who sparked the downfall of his own company, Fazbear Entertainment, murdered over a dozen children in cold blood, and started the tragic chain of events that leads players throughout the series. It is heavily implied that William's true motive is to gain the secret of immortality and live eternally. William is wicked, cold-blooded and methodical, clearly showing no remorse for his actions.