It was a fair enough question. In Hyrule, everyone knew her capabilities and heritage. Even Midna had known about them. It showed how much she took for granted. This adventure was, at least, teaching her to be more adaptable, to take things less for granted and to be less proud. It was a good lesson. "I am no healer, I should be clear, but I know enough. And I cannot know if your world has magic, but mine does. it is near everywhere, and in my case rests in my blood."
"I am a descendant of a goddess, and while I am aware of how prideful that sounds it is no less true. Hylia has blessed my line. It allows me access to divine magic and I was taught how to wield it." And what she hadn't been taught, either because time had made it lost or no one had known, Naryu had supplied in due time. Otherwise she'd have never known how to transfer her soul into Midna. "I can heal a variety of ailments from relatively simple matters like drinking a bit too much to saving lives." She tried her best not to sound too prideful of that, and to make it simple matter of fact.
"It is my duty to aid where I can. I have been blessed and I would make for a poor heir to Hylia if I did not share that when able. It would sadden the goddess if She knew I hoarded my skills." she offered another smile. "But I shall not press if you are uncomfortable with magic. To me, magic is as common as rain or wind but I am aware others may not feel similar."