I doubt if this article belongs here but since we have similiar lists for Esmeralda and Meg, I decided to publish it here. Here is favorite DP list I believe princess Mei from Mulan II would have. Mei highly values romance and also admires people with brave and rebellious personality.
P.S. I am planning to do the same lists for Ting-Ting and Su but these are going to be more difficult to make.

11. Tiana

I am sure that Tiana would be Mei's absolute least favorite DP. Mei would see Tiana as boring, narrow-minded, unromantic, overly rational, materalistic, unadventurous and pig-headed workacholic. The only thing Mei would probably like about Tiana is determination and that she doesn't lose faith in her goal, despite social expectations and people not believe in her success but Mei wouldn't find Tiana's goal itself very admirable. So Tiana would by far Mei's least favorite DP, although if Frozen sisters were official DPs,Tiana would probably be here second least favorite after Elsa.

10. Aurora

Mei would love how dreamy and flirty Aurora is, she would the scene where Aurora dances with owl and probably even would love to have conversations with here. On other hand, Mei wouldn't like how easily Aurora obeyed fairies and gave up her dream. Remember how was she was frustrated when Ting-Ting said that her duty is more important than Ling for her? Mei doesn't seem to be a fan of obedient and dutiful people and she can be pretty judgemental and intolerant of people with different values. So I think she would have a problem with Aurora here, although she definetely would like Aurora much more than Tiana.

9. Cinderella

I think Mei would be more or less neutral about Cinderella. I don't think that Mei would find anything about Cinderella annoying or that she would victim blame her but I don't think there is anything about Cinderella that Mei would find particularly inspiring or admirable. Cinderella is a bit too serious and ladylike for Mei's taste.

8. Snow White

Snow White would be definetely Mei's favorite classic DP but Mei wouldn't care about her either. Mei would like Snow's playfulness, bossy side and that her biggest dream was finding her love but that's all.

7. Merida

Mei would love how determined, rebellious and willful Merida is. She would find her really brave. Mei wouldn't be very judgemental of Merida for giving Elinor a spelled cake, although she may be a bit uncomfortable with it. On other hand, Merida is too unromatic for Mei's taste.

6. Belle

Mei would love that Belle doesn't try to fit social expectations and doesn't ashamed of being unique. She would also love her sense of self-worth, her ability to look past appearances and that she refuses to be mistreated by escaping the castle after being yelled at. Mei wouldn't dislike anything about her much, just prefer feistier and less ladylike DPs. I am pretty sure Renessaince era would Mei's favorite( honestly, I think that Mei is the only of three Mulan II princesses to resemble Renessaince DPs personality-wise).

5. Rapunzel

Mei would love how bold and courageous Rapunzel is. She would also find her warm personality and playfulness cute, it would remind her of Su. Mei would adore the moment when Mei finally stands against Gothel. I just think she would love four other princesses more.

4. Mulan

Mei's movie, Mulan II, makes it clear that Mei strongly likes and admires Mulan but I don't think Mulan would be Mei's absolute favorite DP. Mei loves Mulan for being courageous, rebellious, progressive. passionate, intense and determined and relates to this traits. However, Mulan being unromantic prevents her from being Mei's TOP-3.

3. Pocahontas

Mei would adore how free-spirited, bold, adventurous Pocahontas is. She would love that Pocahontas is mystical instead of being a realist like Tiana. I imagine Mei being a fond of stories of forbidden love so Mei would really appreciate how free of racial predjuice Pocahontas was, how quick she was to trust John Smith( instead of seeing Pocahontas as risky and naive for this act, Mei would call her intuitive and open-minded for this). Mei would be excited with the scene where Pocahontas throws her over John Smith, it would be one of Mei's favorite Disney scenes in general. What prevents Pocahontas from being higher is her moment of indecisiveness during Savages and the choice she made at the end. Mei would prefer Pocahontas to sail with John to England.

2. Jasmine

Mei's would love that Jasmine agrees to marry only for love, prioritises freedom over luxury and safety and doesn't care about people's backgrounds. Mei would applaud when Jasmine sneaks from palace and have tears of joy when Jasmine gets permission to marry Aladdin.

1. Ariel

No doubt, Ariel would be Mei's absolute favorite princess, Mei would adore everything about Ariel. Mei would relate to Ariel's desire to belong to another world, she would give her a lot of credit for not developing predjuices against human, despite how father raised her, and for not being afraid of them at all. Mei would passionately defend Ariel for making the deal with Ursula because she would see both of her goals, desire belong to another world and to be with beloved Eric, as very admirable and worthy of such sacrificies. Bold, passionate, unconventional, hopelessly romantic Ariel would represent the best about humanity for Mei.