Ruan was an agriworld in the Core Worlds. It was one of 18 planets controlled by the Salliche Agricultural Corporation. It was on the Koros Trunk Line, between Kaikielius and Coruscant. It was originally a vassal colony of Kaikielius, but had achieved full Republic membership by 11,000 BBY.
The majority of Ruan's surface was farmland tended to as closely as a park, and kept as neat. Besides its favorable axial tilt and soil quality, Ruan's farming output was maximized by climate control, selective terraforming and crop engineering, and the use of labor droids.
It is unknown if the Yuuzhan Vong invaded the planet, despite extensive measures being taken to dispose of machines and essentially prepare the world for the invaders.
- The Old Republic: Annihilation (Mentioned only)
- The New Jedi Order: Agents of Chaos I: Hero's Trial (Mentioned only)
- The New Jedi Order: Agents of Chaos II: Jedi Eclipse (First appearance)
- The New Jedi Order: Balance Point (Mentioned only)