Not acquainted with the show, but sounds fairly close to what you already have. Don't think you need to rewrite anything, just write her like that from here on out if that's the way you want it.Why didn’t I think of this before? XD
A succubus inspired by Sakie Sato from Interviews with Monster Girls. She doesn’t want to seduce people and would enjoy being magic-less at the bar.
It be fun to turn the succubus thing on it’s head, make her more reserved, awkward romantically, and feel embarrassed in skimpy clothes.