I think Ashya is going to be simply fascinated if she ever learns of the Legion of the Dead. "You're dead? But you're very much alive!" Of dwarves she knows extremely little, and I can see her not understanding any of their traditions and rules.
"And you're so short!"
I can also see her hiding behind her on meeting darkspawn. Despite volunteering, Ashya has still not entirely understood that she will actually be in battle fighting for her life and that of others. And it takes a strong heart to face darkspawn without fear.