Former Protagonists

This category pertains to characters who start out (or are at least turned at some point) as an protagonist or heroes and heroines becoming a villains and join them.

Conversely, it is also possible for fallen heroes to become heroes again, almost always with help from a hero who sympathizes with their story and desires to see them return to the side of good. Often times a hero and a fallen hero will each try to convert the other to their way of thinking.