Hi Nat! This is Eronn and I have three characters:
-Vera, princess of Slovenia and Croatia. I think she could get along with Elisabeth! She puts up a good front, but she's secretly supporting the rebels. She probably does not care for Grigore much, but at least in public she would be polite (if a bit distant).
-Conall, a Scottish rebel, probably won't have much plot with either of yours.
-Kris, younger Norwegian prince. He would get along spiffily with Grigore. And he'd flirt with Elisabeth, because he flirts with all females.