her or cinderella, she would really relate to how hard they have to work and how their both so loyal to their families and how their dreams get thrown out the door at some time (tiana almost losing her restaurant, cinderella getting her dress ripped)...
i think she would also like how tiana doesnt put up with naveen's crap lol

Because their both hard working and Rapunzel because she's like a older Lilo and I think Nani would like that.

Don't we know it's Mulan? She has her poster in her room. But I'm sure she'd love Tiana too.