lunarcyclebooks
In every century, a mortal is chosen to inherit the power of the Ashborn, which is a strong elemental spirit tied by blood by the ruling empire. In this century, the Ashborn chooses Kaelra, an unranked soldier from the outer provinces, instead of a highborn candidate. Her unwanted gifts incite riots, betrayal and a manhunt.
She is assigned an reluctant "handler" who goes by the name Commander Thorne, the empire's most feared enforcer and also the prince's bastard half-brother. Cold, calculating, and utterly loyal to the crown, Thorne considers Kaelra a threat to be eliminated... until her power starts saving more lives than his sword ever could.