Very nice start, but her history is quite sparse. What was her home life like? What really made her join the army? It's a big jump to go from "I want to move out to a place I don't know everyone" and "I'm going to become a soldier for a different nation than my own".
While it's not something to reject over, and the character has a lot of potential, I was hoping you could flesh her history out a bit more.
All that being said, her personality and such seems to be very well developed, which I like to see.