Margot
Lady Margot Fenring is the wife of Count Hasimir Fenring, close friend to Padishah Emperor Shaddam Corrino IV. In Dune (1965), Margot warns Lady Jessica about the threat to her son Paul Atreides, and later seduces Feyd-Rautha on orders from the Sisterhood to retrieve his genetic material through conception.
Read more about this topic: List Of Dune Bene Gesserit