Lucretia

Lucretia was sent to earth to be a guardian angel, an orphan raised by a church to become a nun

she was a nun in the dark ages so always was surrounded by sickness/filth/torture/executions/etc and worked to maintain a church

she was cast out of heaven post vampirism, even though she faced ultimate betrayal and abandonment she didnt reject god entirely because it was all she ever knew how to be and would have no sense of self left if she were to