Those two probably not her favorites, but at least she seems likely to appreciate Mulan's loyalty towards her family. As I already said before, Aurora is way too boring for her xD

I think Aurora was also loyal to her family she follow the fairies , and decided to meet her parents
I think rapunzel would connect more with aurora they are both missing princess

^

And I don't see what she'd find more interesting about Mulan necessarily. Rapunzel is pretty dreamy, girly, a romantic who wants to get out and experience life and learn. That's more akin to Aurora, who is also a lost princess who falls in love with a dashing guy who happens to risk his life for her later.

Then again, she'd probably really relate to Mulan's clumsiness and feeling like you can't please your parents, her wanting to better herself and such, but personality wise I think she'd connect with Aurora more. I dunno, it's hard to say.