[Despite her excitement, Luna seems to calm herself down]

I won't ask about him. I can see that it bothers you when I bring up his name.

Oh, no. Well, really, Hogwarts is the only magic school in Scotland. I've never been to any of the others but it's very possible they're haunted as well. Ghosts don't get along much with Muggles, so they like to be around as many witches and wizards as they can.