Possessed/Brainwashed

Pure Good heroes that get possessed or brainwashed by a villain or another entity. Possession is when the hero's body gets taken over by a demon or another spirit and brainwashing occurs when the hero is controlled, hypnotized, bitten by a rabid animal, etc.

As these Pure Good heroes are being controlled from outside forces, they never willingly corrupt themselves, so it's never completely their fault since they were under the control by someone else.