Something about that blatant defiance gets an arched eyebrow, no reason to get defensive if it's an honest mistake. But it's not like Michinaga has anything to actually accuse her of, and her equally fumbling attempts at the language make him suspect she shouldn't be here any more than he should. Maybe it makes him softer than usual. Maybe he's just tired.

He stares her down as he keeps the grip a moment longer, just to make his point, before letting go. "Keep hand to yourself." Really, getting touchy with strangers is just asking for trouble, Michinaga himself aside.