Who's th- actually, she doesn't have to ask.

She opens the door with a smile that looks more relieved than actually happy, and the first thing out of her mouth is, "You had better be alright," in tones which suggest that if he's not alright, he's going to be even worse in a few minutes.

The fact that she throws her arms around his neck for a hug while saying it might be incongruous- but it's also rather typically Hermione.