Cor briefly picks up on the various smells coming out of the cafeteria. Much of it's even familiar; a comforting thing to file away for later. He mentally takes in the size of the library, even as he follows Noctis towards that private study room.

Of course, he's also noticed one other thing on his royal companion, and it results in the first question to fly out of his mouth as soon as the door's closed behind them: "When did you get the Ring back?"