Ace was staring because he was just thinking too hard. Still, he didn't mean to be so rude as he answered all too bluntly, "Who are you?"

His own rudeness took him back, and he blinked, apologizing with a head duck, "Ah I'm sorry, it's more polite to introduce oneself first right? I'm Portgas D. Ace. Sorry, I'm just new here, so don't take it too personally, please." He offered a handshake, without even fully lifting his head all the way.