Basic Trope: The Split Personality is an antagonist. * Straight: Bob, the shy and kind protagonist, develops a split personality, boB, who is rude and offensive, and causes problems for all his friends. * Exaggerated: Bob is a saint. boB is a supervillain planning to Take Over the World, and doesn't care how many dogs he has to kick or babies he has to eat to do it. * Downplayed: * Bob is loving and kind. boB is angry and lashes out at people from time to time. * Bob's "Evil Side" is just his negative characteristics (anger, pride, etc.) and he has to suppress them. * Justified: A traumatic event triggered a rage inside Bob that is battling for control. * Inverted: * Alice is a villain who develops an heroic split personality. * boB is a mentor personali