Majordomo to the God Emperor Leto II and father of Siona. A descendant of the Atreides line who has served the Worm for decades, Moneo is loyal, competent, and terrified - a man who understands enough of his master's vision to obey but not enough to find peace.

Duncan Idaho is a loyal Atreides swordmaster, one of the finest fighters in the Imperium and deeply devoted to Duke Leto and his family. Trained by the Ginaz Swordmasters, Duncan combines exceptional combat ability with a charismatic personality and genuine warmth. He serves as weapons instructor to Paul Atreides and acts as the Duke's ambassador to the Fremen.

A Tleilaxu-crafted ambassador sent to the court of the God Emperor Leto II - designed to be irresistible to him. Hwi is gentle, sincere, and genuinely good, which makes her the most dangerous weapon the Tleilaxu have ever created, because Leto's feelings for her are real.

A large, powerfully built Fish Speaker whose particular fanaticism for the God Emperor is the kind that can be quietly directed in any number of operationally useful ways. She moves within Siona's circle of would-be rebels on her own carefully chosen terms - and carries a real crysknife from Stilgar's household by Leto's particular dispensation, the kind of small detail the inner circles of the late Imperium tend to keep to themselves.

Former Ixian Ambassador to the God Emperor's court, and uncle of Hwi Noree - believed by those who have given the question careful study to have been involved in Hwi's creation within an Ixian experimental machine. A charming, complex, and cruel man whose extended service at Leto's court ended in an expulsion both sides understood to be one of the more pointed remarks the God Emperor had made in some decades.