As an angel, Zandriel was used to helping. However, he wasn't used to helping humans. He's never even been to Earth before; he was always placed on more dangerous planets. So when the human called upon him, he was confused, but also curious. Amanda hears a mans name echo in her mind, like an alarm that hadn't been snoozed. She knew that he was important, and she needed to find him. She just had no idea where to start. Or why she heard his name in the first place.