Mary's still trying to learn such nuances herself. Deciding not to kill anyone was a good idea on Bucky's part though. In general, Mary would like to hope that the Strangers are not adding to the violence that is plaguing this land.

"So I see," she replies. Her eyes linger on the metal arm for a second longer before looking away, because it's not polite to stare, even if she's never seen any prosthetic function in the way that this one does. "Are you human?" Mary shakes her head. "Forgive me. That is a rude question. It's only that some people here are not human."

And he displays extra-human abilities.