Rose inched closer to the Doctor after the newcomer greeted himself and gave him a slight nudge. "He knows my name. How's he knowing my name when I don't know him?" she whispered to the Doctor. She hoped that he caught on to that and was wondering the same thing.
She was mentally freaking out, but tried to remain calm on the outside for everybody else's sake. Half of her wanted to go back inside the TARDIS and pace the entire length of the console room, but the door was locked and Rose didn't want to be rude. Not when there were people that had come to greet her and the Doctor.
Rose uncrossed her arms from her chest, letting them dangle down at her sides. She half-wished that the Doctor would take her hand to give her some sort of comfort.