 In "Heretics of Dune" (1984), the Duncan Idaho ghola remembers Luran Geasa, his first chief instructor.She had become very attached to him, but had been sent away after allowing him to discover (at age eight) that he is a ghola.Harishka is the Mother Superior in the "Prelude to Dune" prequel trilogy (1999–2001), as the Sisterhood nears the fruition of its breeding program.