R3-S6 was a masculine programmed R3-series astromech droid manufactured by Industrial Automaton on the planet Nubia around the time of the Clone Wars. On his homeworld, R3-S6 was stolen by a group of agents hired by the Confederate General Grievous. They took R3-S6 to the planet Milagro where the astromech droid underwent reprogramming to become a spy for Grievous. The reprogrammed R3-S6 was sold to the Galactic Republic to become Jedi Knight Anakin Skywalker's new astromech droid, as a replacement droid for R2-D2, Skywalker's previous astromech droid. R3-S6 accompanied Skywalker and his Padawan, Ahsoka Tano, as the two Jedi searched for Skywalker's previous astromech droid in the remnants of the Battle of Bothawui in Bothawui space. When the group came across a Trandoshan scavenging freig