Rebecca Bishop is Diana's mother. She was killed by witches during a trip to Nigeria with her husband, Stephen Proctor.
Rebecca was known as an especially talented witch from a family of distinguished witches.
She went to Harvard, where he has met her future husband Stephen Proctor. Both became anthropologists. After graduation she stayed at her university and worked there. Research trips belonged to her work and her husband's. One of their topics had been ancient ceremonial religion.