I call him, now, the flaneur (with that tent accent over the a), this figure who hovers before and after scenes, taking us around. Only we can see or hear him, though he's willing to chat with whoever comes along.
As flaneur, he walks, of course. The hallways of the Oak Floors are perfect for that. He's freer from time than the rest of us. He takes his job seriously, for a nut.
I must resist the temptation, however, to make this figure the hero of the piece. He's about audience only. What they need to stay with the show.