|Credit: Jaemoon Youn.|
I would put her as either a foot soldier in an army, possibly even an officer. If I were to spin a tale, she would be a great warrior who is selected to undertake a mission of vital importance, maybe to save her army from destruction. Or, she's a princess or some other highborn who ran away to escape an arranged marriage (or an unhappy one) and joins the army of a rival kingdom and finds herself having to try and prevent a war between the two.
I really need to write more.