SHADOWBLADE by Anna Kashina

Naia dreams of becoming a Jaihar Blademaster, but after assaulting a teacher, her future seems ruined. The timely intervention of a powerful stranger suddenly elevates her into elite Upper Grounds training. She has no idea that the stranger is Dal Gassan, head of the Daljeer Circle. Seventeen years ago he witnessed the massacre of Challimar’s court and rescued its sole survivor, a baby girl. Gassan plans to thrust a blade into the machinations of imperial succession: Naia.

Disguised as the legendary Princess Xarimet of Challimar, Naia must challenge the imperial family and win. Naia is no princess, but with her desert-kissed eyes and sword skills, she might be close enough.