Oh, right. Her age. She's still a child. I thought she'd be around 19-23-ish. It's fantasy. You don't have to fit in medieval ages for marriages in to look extra edgy, medievalish realistic or something in that line. It makes some readers feel uncomfortable. As I said it's fantasy. Just assume that the age for high society marriages is around 20, like the most of us did. Make it a bit less "realistic" and more in line with today's societies POV, when someone isn't underaged/an adult. Or make it, that that world has 410-415 Days a year, which also last 24h each. That way I'd also be fine with her being "16".