No, events such as this had never been touched upon, were never a major component in the programming that dictated social interaction (limited as it was for him, he was a combat android, not a courtier). He had an idea of what needed to be done, which codes needed to be observed and followed, the proper behaviors and manners. His time with the Duchess had taught him that much.
Despite himself and his earlier protests, despite the fact that he simply wasn't a great party-goer, Tres Iqus found himself staring at the vast array of stairs that was the Grand Staircase. Through methods just beyond his comprehension, it wasn't his standard AX uniform he bore that night, but the suit of the Rosenkreuz Orden, that swanky little number. It was only through three-and-a-halk nanoseconds of consideration that he bothered to don the black domino mask, that simple un-adorned thing.
He couldn't really pinpoint why he'd let himself be talked into this whole affair. Eiji Hoshi and his strange way of conversing. He would have to look into that at a later date.