R4-G9, a feminine astromech droid, showcased a white exterior with bronze trim and a green sensor. Near the conclusion of the Clone Wars in 19 BBY, she was designated to serve Jedi Aayla Secura, and subsequently, Jedi Master Obi-Wan Kenobi. She took the place of Kenobi's previous droid, R4-P17, after its destruction by buzz droids while it assisted her master during the Battle of Coruscant.
R4-G9 was transported to Pau City on the planet Utapau. There, following negotiations between Kenobi and the Pau'an Tion Medon, Kenobi instructed her to pilot his Jedi interceptor back to the Vigilance to brief Commander Cody and prepare the 212th Attack Battalion for the impending Battle of Utapau.
Industrial Automaton manufactured R4-G9 sometime prior to the Battle of Utapau. During the [Clone Wars](/article/clone_wars], Jedi Aayla Secura owned her, and at one point, loaned the droid to human Jedi Master Obi-Wan Kenobi of the Jedi High Council for his search for Asajj Ventress. In [19 BBY](/article/19_bby], R4-G9 collaborated with Kenobi again, just days after the Battle of Coruscant, where buzz droids had destroyed his prior astromech droid, R4-P17. R4-G9 quickly replaced his former droid companion.
R4-G9 was brought to the planet Utapau; Kenobi landed his interceptor in front of Pau City to speak with the Pau'an Port Administrator Tion Medon regarding the whereabouts of General Grievous. As the discussion began, a group of Utai started working on his starship. Medon revealed that the [Kaleesh](/article/kaleesh] was located on the tenth level, supported by thousands of Battle droids prepared for combat. Subsequently, Kenobi instructed R4-G9 to return to the Vigilance and inform Cody, the Clone Marshal Commander of the 7th Sky Corps, to prepare an assault against Grievous and his droid army.
In July 2003, [George Lucas](/article/george_lucas] allowed StarWars.com Hyperspace subscribers to choose the appearance of a new astromech droid for the upcoming conclusion to the Star Wars prequel trilogy, the 2005 film Star Wars: Episode III Revenge of the Sith. Four color schemes were presented: the first, a striped design featuring a metallic gray-blue pattern on a pewter dome; the second, a metallic camouflage green eye and selected panels, aluminum panels, and a pewter dome; the third, an embossed circuitry look with raised surface detail on a gunmetal gray head; and the fourth, a highly metallic design with copper panels on a bronze dome. Ultimately, the fourth color scheme was selected and appeared in Revenge of the Sith.