I've read a lot of stories like this and maybe I'm completely wrong but I have a strong feeling she's the daughter they lost years ago
I mean, it's pretty obvious. They basically handed it to us on a plate. The wizard that attacked the duchass was probably the evil wizard king or someone related to him. I love these stories but I wish the "plot twists" were more twisty
I've read a lot of stories like this and maybe I'm completely wrong but I have a strong feeling she's the daughter they lost years ago