Nievre is one of the naidra. That means she's half naiad, and half dragon. But what's more important is that she's naturally superior to those humans--after all, they can't do magic, can't fly, can't spit fire and in general, can't do anything at all. So what's the harm in having a little fun at their expense?
They always put too much hope in their "Chosen One" and their "heroes." Ridiculous, really. But that's going to stop. Nievre is going to teach them a lesson.
By appointing the lowliest, weakest, unlikeliest hero herself.
"Congratulations, bean. You're the new Chosen One."