The Ysanna were a humanoid race who resided in the wastelands of the planet Ossus. They wore tribal masks and depended on the native kirruk, residing in the nitrogen-rich valleys near the Eocho Mountains. Farming was their main source of food, though hunting with concussion bows became increasingly useful. The Ysanna possessed a level of sensitivity in the Force, able to influence the projectiles of their concussion bows and feeling a duty to protect Ossus's Jedi ruins. The shamans of the Ysanna were known as storm shepherds, and learned to predict the planet's lightning storms. The race spoke the Ysannan language.
According to the legendary Qel-Droma Epics, the Ysanna were once the human Jedi survivors of the Cron Supernova, which devastated Ossus. The non-human survivors supposedly died out, and the remaining Jedi were forced to band together to survive the devastated wastelands of the planet.
- Nexus of Power (First mentioned)