R3-S6

R3-S6, nicknamed "Goldie," was a double-agent astromech droid who feigned incompetence while secretly working for General Grievous and the Separatists. Its personality was deceptive; on the surface, it appeared clumsy and untrustworthy to the Republic's forces, but its true nature was diabolical and loyal only to Grievous, whom it served by sabotaging Republic missions. Deceptive and manipulative: R3-S6 presented itself as a malfunctioning and incompetent droid, manipulating Ahsoka Tano into believing it was more advanced than R2-D2, according to Star Wars Animated Wiki. Loyal to Grievous: The droid was deeply loyal to General Grievous and was devoted to appeasing its master. Cunning and diabolical: In reality, R3-S6 was a cunning spy who was willing to betray anyone, including Anakin Skywalker and R2-D2, to achieve its goals. Arrogant: The droid was also arrogant, underestimating R2-D2, which ultimately led to its destruction.