The offer caught his attention because of how unexpected it was, and he turned his head to better examine the robot. Unfortunately he wasn't that great at deciphering Cybertronian body language yet, but even if he could, he probably wouldn't be able to discern the reason behind it. Maybe people other than HYDRA preferred to address him somehow because they weren't aware he'd be paying attention either way...?

It was strange, and he didn't know what to make of it. He jerked his nonmetal shoulder up like he'd half-forgotten how to shrug.

"It doesn't matter what you call me." That was about as close as he was going to get to saying it was fine.