Do they have any really out-of-left-field kinks/fantasies? Maybe even something that they wouldnβt necessarily want to act on but have still thought about? [[ for Neraine. Donβt worry, Luxu is totally not watching π ]]
Neraine is super into the fight > sex pipeline.
What she wants, although she may not immediately admit because she's so repressed, is for her and her partner to, essentially, beat the shit out of each other, and then fuck nasty. Of course, she can heal, so there might be some gore involved. It's a combination of a pain kink (sadistic and masochistic), a want to be challenged, being an adrenaline junky, and very deeply wanting to jostle for control. She finds violence hot and it works her up. It should absolutely be something like, whoever wins gets to be on top type of things. With the other person switching 100% on the table if they get too complacent. If you could say, restrain Neraine and also fuck her, without her flipping it on you, I think she would find that extremely hot. Just be ready to get mauled if she escapes lmao, topping or domming Neraine is an earned position. And she likes to ride; so she'd have no issue with rolling you over and taking what she wants.
Put a knife or weapon to her throat; slap or beat her; pin her down and use your weight to your advantage; pull her hair, scratch, bite, etc., whatever it takes. If you're really good at it you might even get her to submit or fully accept being topped. If you're not, then prepare for her to give as good as she takes. If you restrain her, make sure it's something she legitimately can't get out of on her own. She's very much into position or role swapping during scenes, if this is something formal. Losing domination or gaining domination.
Luxu should also know the degradation could be apart of it and the point. Teasing her for being into it even when she's fighting, demanding she submit so she can feel good, hell, call her a slut or edge her. Weaponize any residual repression she has against her, until she has to admit that she wants it and needs it, and he's the person who gives it to her. Again, just know she's going to literally fight the entire way.