Ula has hidden from her own people in an effort to cease pressure from local government to create weapons against the Nine. When a man with wings comes knocking, she slams the door in his face.
Deniir has gotten as much information on the designer as he can, but seeing her taming some of the wild flying predators out back eases her rude dismissal of his presence. She is as wild as the beasts she uses to get airborne, and he sees the means to get her to follow him to the stars.
Offer her complete freedom and she will follow him wherever he leads.