Thi-Sen was a male Talz who was the tribal leader of a group of Talz on the planet Orto Plutonia. During the Clone Wars, both sides, the Galactic Republic and the Confederacy of Independent Systems, sent a task force to the planet. While the Republic troops tested speeder bikes, the battle droids of the Separatists attacked the peaceful Talz. This resulted in a Talz counterattack in which both the Glid Station Republic outpost and the droid forces were destroyed. The Republic sent on behalf of the moon Orto Plutonia, Pantora, another task force of troops under the command of Jedi Knights Anakin Skywalker and Obi-Wan Kenobi.