"She was here before you then?" He asks, still half frowning. That's pretty much confirmation and he tries not to focus on the way that makes him feel. There's nothing he can do, he has to bury that anger that they play with people's lives without a shred of care, and try and find a more useful outlet.

Memorising the numbers of the districts of Elsa and Anna was the least he could do in truth. He was naturally going to keep and eye on Anna, and that care would extend to Elsa. After all, she's someone whose important to Anna, and as antisocial as he is, one of Kristoff's main goals in ensuring Anna has some measure of happiness, even here.

"Ok." It's pretty simple in truth. Anna... sometimes, can be too trusting, but she'd been getting better, and Elsa's trust seems harder to earn. So if both of them seemed to trust the boy then he doesn't really have a reason to grow suspicious. He'll check later, sure, but for now he just gives a slight nod, looking a touch more awkward. "Thank you. For that, that is."