Luna?

[DMKA]

Mmm, maybe they're doing a Dagger=Garnet=Sarah/Lightning=Clair/Amalia=Ashe thing? Her hair is different, so maybe she's incognito for their meeting or something. She is from another country that's involved in some giant war going on after all so she could have plenty of reasons for going by a different name and altering her appearance, like Ashe did.

Or maybe she's a completely different character? Stella's sister perhaps? She is in different hair and clothes, and her facial structure is slightly different (though that could be attributed to this game's insane development).

Either way, wowee those graphics of her are pretty.