@kayla-joy I think you’re likely to lose something of the character if you use DID as an easy out. A redemption arc would probably be more effective and more meaningful, and you’re less likely to lose a piece of the character. Your antagonist’s motivations should be a part of him, and having those motivations change is more effective, I think, than giving those motivations to someone else, even if that “someone else” is just a separate personality.
Fantasy/dystopian/sci-fi author. Mythology nerd. ENFP. Singer.