In 26 BBY, Reug Yucon traveled with fellow scientists Tic Verdun, Joveh D'a Alin, Fort Turan, and Talie Heathe on an expedition to the planet Haariden to carry out investigations on geological and volcanic activities there, to accomplish global mapping for the mineral titanite, and to determine the effects of the world's environment on its ecosystem.
In the midst of their research, however, the scientists found themselves caught up in a raging civil war and soon became stranded when their ship malfunctioned. Pinned down in the countryside, they were able to send a distress call to the Galactic Senate (the sponsor of their mapping mission) while attempting to negotiate a truce between the opposing forces on the planet. Fearing that the scientists would be held as hostages or bargaining chips in the ongoing conflict, the Senate appealed to the Jedi for help.
The scientists were eventually found by Obi-Wan Kenobi, Anakin Skywalker, Soara Antana, and Darra Thel-Tanis, who were dispatched on a rescue mission to the crisis-bound planet by the Jedi High Council. From a deserted village holdout (in war-besieged Tenuuri), the Jedi—leading them safely through perilous, war-pocked terrain—protected the scientists, until all were able eventually to flee the planet.
- Jedi Quest: The Master of Disguise (First appearance)