Fan Casting Duncan Idaho in Peter Berg's Dune

The Atreides weapons-master, sent by Leto to make peace with the Fremen before the betrayal. Survives the massacre, finds the Fremen camp, and swears unshakeable allegiance to Paul. The last living link to Leto's command—a soldier of absolute loyalty whose presence proves the dead Duke's wisdom was correct. Lethal, principled, and incapable of betrayal.