Fallen

Many heroes walk a thin line between good and evil; indeed, many heroes have fallen into despair, rage or even madness, and once proud heroes descend further into the path of evil, often fighting against people they once protected or fought alongside.

Originally protagonists or forces of good, these heroes turn evil due to events in their lives, such as being corrupted by another villain (i.e. convinced by villain's arguments), their desire for revenge, being severely abused for too long, a failed love relationship, betrayal from the good side to the dark side, or any other unresolved traumatic experience in which they question whether or not the good side is worth fighting for. However, some heroes may turn for more greedy reasons (i.e. "From Sugar to Excrement" scenario).

A Fallen Hero - or hero turned to the dark side - is usually the end result of a protagonist exposed to a Corrupting Influence, Brainwasher, and occasionally an Extortionist, a Blackmailer, or even a Bond Destroyer. However, some of them can still redeem themselves again