Wings of Ashes by Anna Santos

My name’s Grace and I’m half-angel, half-werewolf.
My unique condition was the reason my parents were killed and makes me an outcast among the Celestials. But not everything is bad since I live with my werewolf grandfather at his Hunter Academy.
When dangerous enemies invade our grounds, targeting me, a rogue hunter helps us, and I find my soulmate. Noah is strong, lonely, and a skilled killer. He has a dark past and doesn’t seem to recognize me as his mate. Yet I can’t seem to stay away from him. He might be dangerous but he’s alluringly captivating and I see kindness in him.
When new attacks target the Celestial family that rejected me, Noah and I need to join forces if we want to survive in a changing world that wants all the Celestials dead–myself included.