Bill watched with a smile as Jonathan came aboard the TARDIS, the obvious confusion on his face. "Hallo, mate," she greeted him pleasantly, "I'm Bill. I've got a room here too." She did not add the 'now'. It had taken the Doctor far too long to actually invite her to move in, in her opinion. But she was absolutely keeping the apartment she'd been given to have a private space of her own. Bill didn't like the idea of bringing friends or whatever to the TARDIS without letting the Doctor know. "Best just say whatever you're thinking. It makes him happy."