In C-3PO's first appearance on Star Wars Rebels, he initially appears to be a true blue Imperial while R2-D2 is in on Bail Organa's Rebel activities. C-3PO even sent a distress signal to the Empire for rescue.
At the end of the episode, however, Bail Organa asked if C-3PO had revealed Bail's identity, suggesting C-3PO may be in on the act...or not.
So which is it? Does C-3PO identify himself as an Imperial senatorial protocol droid or a Rebel in disguise?