*snort* Rodimus didn't get a chance to be heroic. Currently, Rodimus has no idea Perceptor is hanging around with the Crescendolls or associated with them. He thinks he's on extended vacation.
He and Perceptor have met with each other which is why Percy is giving off an irritated gaze. Prior to the events of this story, Rods was at one point, Perceptor's personal bodyguard when several members of the High Council were getting kidnapped. Perceptor was, no, IS, flustered by Rodimus' absolutely brash and, in Perceptor's mind, stupid ways of doing things. It does not gel well with Percy's much more logical personality.
Rodimus is also Perceptor's love interest.