Ruusan was originally a temperate, pleasant world, inhabited by Ruusanians, Humans, and a strange sentient species known as Bouncers. Ruusan's mineral deposits proved disappointing but it was the only source for the Ruusan crystal. Ruusan had three moons, referred to by locals as the "Three Sisters." Smugglers claimed that at least one of the moons had ruins of an ancient civilization.