Under His Wing by MandyMRoth

As a warrior and prized soldier for the Royal Hawks, Gardelle is known to be fierce and loyal. This immortal bird-shifter gave up the life of a bachelor to raise his niece in the human realm and now that she’s mated to the future king of the falcons, he’s been able to focus on his commitments to his people and the men who serve under him. He spent enough time living among humans to know he doesn’t want to return to it. Yet, the pull to one human, in particular, is too much for him to resist. When he learns she’s been marked by his sworn enemies, he’ll do whatever it takes to keep her safe and under his wing.