Lio Josse was a Jedi of the Jedi Order. In 232 BBY, they were part of the Jedi's effort to help the agriworld Hetzal Prime and its system during the Great Hyperspace Disaster. Under coordination of Jedi Master Avar Kriss, the Jedi shifted a tibanna tank away from its collision course with the Hetzal system's largest star and saved the system, though Josse died due to the effort expended in the endeavor.
Lio Josse was a Jedi of the Jedi Order who operated during the High Republic Era. During the Great Hyperspace Disaster in 232 BBY, they were part of a Jedi effort to aid the agriworld Hetzal Prime and its system, participating in the galaxy-wide effort to prevent a collision between the Hetzal system's largest star and a liquid tibanna tank, as the impact would cause a system-destroying explosion.
Lio Josse died while helping divert a tibanna tank from the Hetzal system's largest star.
Under the coordination of Jedi Master Avar Kriss, Josse and many other Jedi across the galaxy linked their minds together to help divert the tank from its collision course. However, as they devoted all their focus to the endeavor, each Jedi who faltered under the immense strain made the task more difficult. Though the crisis was averted, Josse died, having been unable to remain safe in their surroundings while expending effort to move the tank. Kriss sensed the Jedi's death, briefly acknowledging their loss mentally.
In 229 BBY, the Vurk Jedi Master Harli Cogra wrote a book titled Chronicles of the Jedi, which detailed the Jedi of the High Republic Era. In the third chapter of the book, Cogra mentioned the Jedi who had participated in Kriss' network to save Hetzal Prime, including the many who had perished, such as Josse.
As part of the Jedi Order, Josse was a Force-sensitive individual trained to move objects with the Force.
Lio Josse was first introduced in the novel Light of the Jedi, written by Charles Soule, and, albeit indirectly, in the young-readers book The High Republic: The Great Jedi Rescue authored by Cavan Scott. Both books were released as part of the Star Wars: The High Republic multimedia project's Phase I on January 5, 2021. Light of the Jedi first identified the character by name.
- Star Wars: The High Republic: Chronicles of the Jedi