Roth-Del Masona was an aging Jedi Knight of the Old Republic with dark skin and hair that began to gray in the years leading up to the Clone Wars. He was one of the two-hundred Jedi Knights that accompanied Jedi Master Mace Windu to Geonosis in an attempt to end the Separatist threat encouraged by the Confederacy of Independent Systems. While many Jedi lost their lives at the Battle of Geonosis, Roth-Del Masona was one of the few to survive.

As the war spread across the galaxy and the newly commissioned Grand Army of the Republic went to war against legions of Separatist battledroids, Roth-Del Masona took up his lightsaber as a commander in the clone army. During the course of the war, Masona served as military assistant to Jedi Master Mace Windu. He was on Coruscant when Separatist commander General Grievous launched his attack against Coruscant in an attempt to kidnap Chancellor Palpatine. Masona joined Jedi Masters Shaak Ti, Foul Moudama, Roron Corobb, and others to protect Palpatine and get him to safety. Unfortunately, as Palpatine and Masona hid in one of the Chancellor's secret bunkers, Grievous breached the security and engaged Roth-Del Masona. It would be the Jedi Knight's last. He became one with the Force when General Grievous decapitated him. Grievous slew many Jedi that day and was ultimately successful in securing the Chancellor.