Finally got around to watching the movie and I came out shipping Nyx and Luche in this one-sided love-to-hate-you way.

Prefer Nyx as a top or Luche as a powerbottom but you do you. You can set it anywhere in the timeline, during their younger years when they're still new to the Kingsglaive, somewhere around the movie's timeline, hell, some sort of afterlife is perfectly fine as well.

I'm fine with dub-con to mild non-con, but no all out rape please.