It's probably a really stupid idea, Anna thinks. Stupid enough that she spends a long, cathartic hour talking to Kristoff on the phone while Elsa's out.
She doesn't know where she's gone. Didn't ask, and Elsa didn't offer. Though, with their avoidance allemande, it's not really a surprise.
"If you think that's what you need, then go for it," Kris says. And it might be what she needs, but it's not really what she wants. It's what she has to do in order to move on and repair her heart.