Bene Gesserit
Murbella is a young Honored Matre who attempts to imprint the Bene Gesserit-loyal Duncan Idaho ghola in "Heretics of Dune". She finds that the Tleilaxu have secretly programmed him with the male equivalent of the sexual powers used by the Honored Matres to enslave men. Murbella and Duncan imprint each other, and in her weakened condition Murbella is easily captured by the Bene Gesserit. Her new addiction to Duncan keeps Murbella subdued, and Bene Gesserit soon begin to train her as one of them, though they do not completely trust her.