Anna's... really bouncy when she introduces Kristoff.
Elsa's not used to other people and she's barely friends with Anna as it is – who is this boy? Is Anna just being cruel?
The redhead doesn't notice Elsa's distress, but Kristoff does. While Anna's at the snack bar, he leans down and says, almost off-hand, "How's living with adult-Anna like? As a kid, she was a monster." His grin comes easily, and Elsa can't fully hide her surprise.
"Oh?"
He nods. "Do you have any siblings?"
Suddenly, Elsa's not so upset.