Reverend Mother Luran Geasa was a failed Reverend Mother younger than Schwangyu who was one of the first teachers brought to Gammu for the ghola project and was the chief instructor of the twelfth ghola of Duncan Idaho the Bene Gesserit order from the Bene Tleilax. During Geasa's training of the ghola she developped affection for the child, but was replaced at Gammu after Duncan Idaho discovered that he was a ghola.
Appearances
- Heretics of Dune (mentioned only)