Role in the series
Commander Sato and his squadron rescued the crew of the Ghost from the Star Destroyer, under the command of Grand Moff Tarkin, after rescuing the Jedi Kanan Jarrus, who had been imprisoned on one of the Star Destroyers. From there, the crew of the Ghost teamed with the Rebels of the Phoenix Squadron and continued to pursue Imperial targets.
After the small fleet had gathered again after an attack on Imperial freighters, the crew had gone to the bridge of the Phoenix nest where Jun Sato thanked them for their help in the attacks. Shortly thereafter, the astromech droid Chopper received a message from minister Maketh Tua. Kanan sent the droid the news, in which the minister asked the rebels to take her away from Lothal. In return, she would give them valuable information. Commander Sato sent the crew of the Ghost crew to Lothal as he thought the information was valuable enough to take the risk of the mission.
The mission failed and the Ghost crew was perused by Darth Vader with a tracking device hidden aboard the shuttle they stole. Phoenix squadron tried to stop Vader, but had to accept big losses and could not stop the Sith from attacking Phoenix Home. Despite Commander Sato's refusal to leave his command ship, he was eventually forced to abandon ship. Sato and his crew were taken by other ships and fled into the hyperspace.
Since his old flagship ship had been destroyed, Commander Sato switched to the Liberator and made this his new flagship. But Sato was aware that the Rebels had suffered a great loss, so the crew went to search for an old friend of Ahsoka Tano, who had an enormous knowledge of hidden space stations and inconspicuous planets that could provide Rebels a base of operations. The mission was successful with the Ghost crew returning with the former clone-warrior CT-7567, "Rex", who provided the Rebel fleet with information.
Some time later, some of the rebels' ships were sent under the command of Captian Hera Syndulla in the spirit to the planet Ibaar to supply the inhabitants with food because the empire had built a blockade around the planet as they cooperated with the Rebels. The first attempt to penetrate the blockade failed and the Rebels lost a vast amount of ships in the process. Sato sent Syndulla and her crewmembers Sabine Wren and Garazeb Orrelios on the advice of Rex to Shantipole, where they met the Calamari engineer Quarrie. He had developed a Star giht which succeeded in penetrating the blockade over Ibaar. Through this success, Sato, on Kanan's request, promoted Syndulla to Phoenix leader.
- He was originally named Fells, but in later development his name was changed to Sato.
- His name is derived from Japanese film director Jun Fukuda and composer Masaru Sato, who worked together on the Godzilla series.