There’s quite a few suggestions at things about her character within the Shooting Star short & the Busan MEKA Base map.
Here’s something I wrote on one of the other threads that covers most of it I think:
Basically, there’s very little solid evidence, but there are many suggestions in both her design (her moniker, her mech’s name, her physical appearance & attitude) & her character relationships (especially to D.Va) that hint at a potentially really interesting character & even more interesting scenarios to develop from her & her interactions with the rest of the world, especially D.Va.