Having lost his faithful
R4-P17 astromech droid during the space battle to rescue Chancellor
Palpatine,
Obi-Wan Kenobi was outfitted with a new brassy-colored droid for his mission to
Utapau. In his quest to find Grievous and bring an end to the Clone Wars, Kenobi flew with R4-G9 (Geenine) on his starfighter's wing.
Playing a decoy gambit, Obi-Wan instructed the loyal droid to pilot his Jedi starfighter offworld while he secretly remained behind in order to track down the deadly General.