She maintains her new power level as a hero for about two years, before the Hellfire Club starts messing with her mind, guiding her toward, for lack of a better term, the dark side. (Source.)
*Official art by illustrator Jin-Hwan Park*
So, as you can see, the transformation from good to evil can be a result of both external and internal causes. Maybe the character gets captured and fitted with a device like Sam's watch in Transformers: Dark of the Moon, which forces him to betray his friends and comrades. Or maybe making the "wrong" decision becomes the right one in order to save someone important. Or, like Chun-Woo (and Riku from Kingdom Hearts or Sasuke from Naruto), maybe he's always had a little bit of darkness inside him, and all it took was a compelling push to cross the line.
It hurts most when, like Chun-Woo, the character starts out perfectly likable. He's flawed and kind of shallow, but he's a good person. Readers grow to love him, to see him as their security blanket for how insanely kickass he is and how he always pulls through. So when something happens and the light switches, it's devastating. If you can do that to your readers, you're doing something right :) (and they might hate you for it, but that might be okay too lol)
So what do you guys think? Harvey Dent from The Dark Knight would also be a great example of this archetype! Who else fits?
Previous posts in the archetype series:
• 1: Broody Jerks with Hearts of Gold
• 2: The Hero Who Hides Behind a Smile
• 3: The Goofy Guy Who Secretly Kicks Ass
• 4: The Designated Psychopath
• 5: The Mad Scientist
• 6: The Child Prodigy
Have a great week!