John Wayne Cleaver

John frequently associating his name with infamous serial killers, such as John Wayne Gacy, the truth is that his parents named him after John Wayne, the famous actor. He is officially diagnosed with a "Conduct Disorder" because of his young age. But his therapist tells his mother that John qualifies, despite his age, for an Antisocial Personality Disorder (ASPD) diagnosis, in other words, sociopathy. John was 18 years old in the events of I Am Not A Serial Killer. He helps in his family's mortuary, which is run by his mother and sister, has an obsession with serial killers. He really wants to be a good person, so he has a rule system designed to copy "normal" behavior, to suppress his dark side and keep people around him safe. He created some newer ones when they are seen. But over time he had to adapt them, for example, when puberty hit, it is a rule book of not looking at girls' chests.

When the demon next door (no, not the pretty girl) starts killing people in the town one by one, John allows this darker side out in order to save them. He struggles both to understand the demon and with his own nature. His fear is that he may never regain the control he once had over his darker side. John makes a final stand against the demon and something that he is scared may be even more monstrous than the demon - himself.

john is arrogant, psychotic, and is constantly trying to control his anger.