While Corrin is brooding alone, she meets Azura, who is singing to herself in the lake. Azura is Corrin. I mean, she's the Nohr/Hoshidan counterpart to Corrin. I mean... Shortly after Corrin was kidnapped from the Hoshidan royalty and brought to Nohr, Azura was kidnapped from the Nohrian royal family and brought to Hoshido. And apparently King Garon and the siblings were like, "Whatever, Corrin's way cooler and we love her more, just forget about Azura," I suppose.

Anyway, Azura likes it here and likes the Hoshidans and thinks the Nohrians are evil, so she doesn't want to go back. Just here to give you another parallel!