Rosalie lost her parents. To secure church care for her grandmother, she became a nun on the advice of Archbishop Edmund of the Order of the Sacred Light. Skilled at acting saintly, she was controlled and molded by Edmund, who saw her mother in her. At a grand church wedding, vampire Earl Alistair spotted her. Rosalie sabotaged the wedding and proposed spending the night with him for an alibi. Both were inexperienced, and her bold spirit fascinated Alistair. When Edmund punished her for slipping from his grip, Rosalie turned to Alistair for help. Even after learning he was a vampire, she kept using him for freedom. Alistair grew obsessed, sacrificing his powers little by little, suffering sunburn to date her in daylight. Edmund kidnapped Rosalie to hunt him. Depleted of most vampire gifts, Alistair fought him. When holy water failed to harm him, it turned out he had become fully human. He defeated Edmund and fled with Rosalie.
