Rox was a large Ozrelanso member of the Path of the Open Hand cult who was preaching the Path's teachings on the Galactic Frontier during its fall in 382 BBY and was unaware of the event as a result. At some point between Path's end and around 381 BBY, he was among the Path members tracked down by the pirate leader and former Path member Marda Ro and was one of the few to join her group.
After Rox joined, Ro presented him with a monster known as the Great Leveler. Around 379 BBY, he assisted Ro in feeding the Leveler a Jedi that she had captured. Later, Ro mentioned him in a message she recorded for her descendants, which her great-great-grandson had listened to by 252 BBY.
Rox was an Ozrelanso who became a member of the Path of the Open Hand cult at some point no later than 382 BBY. They went out into the Galactic Frontier to preach the Path's teachings and as a consequence were away from the Path's home planet Dalna during the Path's violent end. Unaware of the Path's collapse, he continued operating in the Path's name.
At some point between the Path's fall and 381 BBY, Rox was among the few scattered Path members tracked down by Marda Ro—a former member of the Path and a pirate leader. She told Rox a lie about how the path ended in order to put herself at the center of his faith and desires and told him to either join her band of pirates or cease any Path activity. Rox was among the few who chose to join her.
After joining Ro, Rox was taken by her to the Gaze Electric, her ship. She revealed a Force-consuming beast called the Great Leveler to him and explained that the group's objective was to keep the Leveler safe so that in the future it could return to destroy the abusers of the Force. Ro also added that the group had no religion to share or a story to tell the galaxy, as only surviving was important. Unlike most of the others serving Ro, Rox did not go out raiding and instead stayed on the Gaze Electric. He took care of ordinary needs of the group, such as cooking or securing supplies.
Around 379 BBY, Rox was aboard the Gaze when Ro returned to the ship from an astronomical object with a severely injured Jedi she had assaulted. As instructed by Ro, after she landed with a shuttle, Rox entered it accompanied by Alirya and Milan Stor—other beings that served Ro—and the three noticed the Jedi's body and stared at it. Ro explained that the Jedi was still alive, but would soon regret it.
Rox and Stor dragged the Jedi to the Great Leveler and Rox dropped him next to the containment shield that caged the Great Leveler. Ro deactivated the shield and the Lever attacked the Jedi, consuming him. For a moment, Rox watched as it turned him into a stony husk, but eventually turned away and didn't observe the whole process. Afterward, Ro ushered the Leveler back into the room it was caged in, and strode away.
Later, Ro talked about Rox in a journal she recorded for her descendants and stressed the importance of passing on his name. By 252 BBY, during his youth, Ro's great-great-grandson Marchion Ro had listened to her recordings, including the messages where Rox was mentioned.
Ro considered Rox large. Unlike other beings serving Ro, he did not participate in pirate activity, instead having more mundane responsibilities, such as cooking or taking care of supplies.
Rox had experience with cooking.
Rox appeared in a flashback in the short story "A Closed Fist Has No Claws," written by Tessa Gratton and published in the 2023 young-adult anthology The High Republic: Tales of Light and Life as a part of the Star Wars: The High Republic multimedia project.