[he jumps in surprise, but doesn't try to brain her with the sword. Robots don't shout in her voice, after all. Instead, he quickly shifts to a proud stance and gives a salute with his sword]
PM! PM, greetings!
[he notices her expression next, and looks worried as he moves in closer]
PM—oh, whatever is the matter? [not that he doesn't have a feeling what the matter might be...]