The only 'redemption' arc I want for her is to make the defenestration scene reality. And not just a daydream.The dev kinda did too good of a job making her legit despicable. Betrayed MC, destroyed him mentally, ruined his life with that betrayal, arrogant, belittles him and then ALSO tries to fuck him over a second time years later for no reason bar spite after we see the guy is damn near in the gutter. The excuse...essentially jealousy and insecurity it seems. That's a bitch that is direct from satan.
The dev would've had to have written one hell of a redemption. She's a fantastic villain. If the plan was to redeem her he probably should've front loaded some positive traits other than great tits because she's too easy to dislike.
Then, she can be fertilizer and actually make a positive contribution to the world.