If you want to swing this, I advise not taking a societal angle and instead taking an individual angle; vieran society as a whole will not bend their rules for one random xaela girl, they obviously hold their weird societal rules and traditions very close. But every society has some total softies in it, so it's just a matter of there being one who can't turn down a cute kid!

Of course then there's the question of how the rest of the village handles it, and I feel like that's where the actual story is. Was she hidden from them, did they barely tolerate her, was she kicked out eventually? I couldn't tell you, but I bet there's a good story there.

When you come up with a messy and difficult character concept as a writer, realize that might be a good thing, because questioning societal norms is a great story angle.