What disorders does William Afton have?

I'm curious to know, could you elaborate on the mental and emotional disorders that William Afton, often referred to as the villainous "Purple Guy" in the Five Nights at Freddy's franchise, is believed to have? Are there any specific diagnoses or traits that have been attributed to his character, such as narcissism, sociopathy, or perhaps even dissociative identity disorder? How do these disorders manifest within the narrative and contribute to his twisted motivations and actions?