After seeing all the "evidence" I was thinking Mulan was a guarantee. Though when thinking about it, not seeing a costume disc for Mulan is proof for me it isn't her.
Mulan would need to have two costumes, the armored Ping costume and something more casual to really fit.
just casual and you lose the role of that character, just armored and it isn't fully true to the character.
Mulan is a little weird as she doesn't have an appearance that is the iconic appearance.
Edit: that is unless they have an armored version of her not disguised as someone else.