Cage&Briggs
Noob
More pics here:
https://twitter.com/search?q=Li Mei&src=typd&mode=photos
She is seen in story and has a completely new and detailed design. Not to mentioned she's aged.
I think she has a pretty high shot as a dlc character. She wants to protect her village and is fighting for it, she could be pretty important to the story. I think she would be a pretty interesting character.