Oh, hello? Someone had thought to come to see the new Head of House just ahead of Mo, and he wasn't at all surprised to see little Sophie entering the Head's office just as Mo himself took to the corridor. Well, this was a bit awkward. Should he stay, or... should he come back later?

It didn't hurt to knock, at least, and let the librarian know that he wished to speak to him shortly. Mo politely knocked once before stepping back. He'd be happy to come back later, honestly.