If it's any consolation, Hermione's particular bout of frostiness is largely to do with with recent events.

At least she's more or less decided that Ron won't be getting the birds sent upon him?

She's quiet for a moment, the late night seeming to have an effect on the way her thoughts are taking her.

They're ... surprisingly introspective.

"Did you ever think," Hermione starts, "that you'd ever end up here? I mean, as a First Year you have so many expectations for the future as a wizard. But this ... all I'd ever known about You-Know-Who had been through reading about him in history books."