You are good to me, Master. I'm sorry.
~ Quasimodo to Judge Claude Frollo.
Heroes who work as the servants of villains. Due to the loyalty they have to their masters, it is often possible or likely that they have no idea that their masters are evil. Sometimes they might be possessed or brainwashed by the villain.

Not to be confused with Apprentices of a Villain.

Good examples of Heroes who served a villain: Dominic Toretto, FinnIlsa Faust, and Karai (TMNT Cartoon Series Only).