I find it weird that the other members of the group don't meet her during this scene, when it was clearly obvious that people are aware of her presence during the other moments you meet up with her.
Considering the time of day, it's possible everyone else was out. That, and the only time the others ever notice Elizabeth is during The Answer. The rest of the time, they can't even see the door to the Velvet Room.
If you, by any chance, should happen to but find it acceptable...I would like to beseech of you... your guidance...To be sure, even I...am at least aware of what it means to come up into a gentleman's room...