Rikyams were the central brains of the worldships of the Yuuzhan Vong. Relatives of the yammosk and dhuryam (but with less religious significance), they controlled everything onboard the worldship, monitoring the environmental controls, controlling the breeding of creatures, and monitoring ship functions. If a muscle spasm occurred, the rikyam would be able to moderate the spasm so that it would not threaten the worldship.
- The New Jedi Order: Edge of Victory II: Rebirth (First appearance)
- The New Jedi Order: The Final Prophecy (Mentioned only)