Yakiri

Sarae successfully hid Ahreyal among humans for twenty-two years, but after the fallen angel Azazel, who declared war against the Heavens and humanity, finds her ward, she must reveal the truth she's kept from her and help her unlock her angelic abilities.

Christopher has always been at Sarae's side.  When his ability to sense danger warns him of an unknown enemy lurking in the shadows, he'll do anything to protect the angel he's loved for centuries.  But can he convince her to stop fighting her feelings long enough to fall in love?