Kai, the result of an angel and human fusion, she's Sabrina's guardian angel. Recruited as a witch hunter, she's at odds with her duty to protect her, and her job to kill her. Ambrose is restricted to the spellman grounds, and a chance meeting with Kai, he's instantly smitten. She's hiding something from him, and he's determined to find out what it is. Faustus knows her secrets, and is willing to keep them, in exchange for her corruption. He'll protect Ambrose's love for her, as he's not supposed to be with any non-witches, and she'll fall from grace in return. What he didn't expect, was to fall for her himself.