There's still a month before school actually resumes, and Anna takes advantage of the fact that her living expenses are effectively halved by taking a whole week off from work. She slums about in her pyjamas and eats cereal for lunch.
She's probably a really shit roommate, thinks she should apologise when Elsa spots her. Elsa frowns a little before returning to her room, and the chocolatey milk curdles in Anna's gut for a moment.
But then Elsa reappears in her own nightie; she grabs a bowl of cornflakes, and sits on the couch next to Anna.