I am getting so sick and tired of these question and demands from fans..... "There should be this and that girl!!!"
Disney does not HAVE TO please every damn person on this planet and if they try, they get bashed for it ( PatF,Tangled being CGI)
There are other animation companies in the world, who did very wonderful movies with many different cultures in them.
Want to see other asian animated girls?
Try The butterfly lovers, empress chung (if you can find it) and others.
For all, who want to expand their animation horizon, try this list on wikipedia of feature lenghts animation movies, you will find many many many maaaaaaaaaany... pearls in it
link