"An emperor?" Oh, oh dang. Yeah, that counts. Sora's going to hastily brush himself off in an attempt to look presentable, then make a sort of standard, but fully well-meant bow. "It's nice to meet you! Uh, your highness?"

He'll come back up in an eager rush, scratching the back of his head and looking at her hopefully. "How's that? Or uh, are you not that kinda princess?"