Will there be a completely naked skin? Will there be an animation of sex after defeat?
The only version of a naked skin is when your armor gets destroyed. And no, I'm not a competent animator of any kind so I wouldn't expect any sorts of animations at any point lol.
Why only when the armor gets destroyed?
I mean you CAN take Red's clothes off. She'll simply refuse to let you progress the game until she's wearing clothes. That's just the way I made it.