When it comes to romance, I tend to treat it like a relationship in real life—that is, see if they have chemistry and go from there. I don't like trying to force characters with bad chemistry or no reason to be together into a relationship, nor two unknown characters into one without taking into account their personalities as seen through writing. Hopefully that makes sense?
And sweet, I loved her name and abilities, and I'm looking forward to hearing about her personality!
I say we go for a new world entirely. We'd definitely have a lot more freedom that way, and also we don't have to be stuck with researching specific time periods for accuracy lol. Plus, I'd love to hear the ideas you have for a new world!