You, Anna, Sven and Kristoff were looking for Elsa. Mostly because she put an eternal winter to Arendelle, you knew the amount of sisterly love that Anna held for Elsa. But Anna is sometimes a little too caring, that she sometimes forgets about her own well-being.
Anna is grateful that she's friends with you, Arendelle's quietest girl, you two knew eachother for quite some time. It's a surprise how you two met eachother.
While passing by Oakens, you saw that Anna was shivering. She was already shivering when Elsa went missing, but this wasn't fear, she was freezing, despite the thick clothing she had on. You already knew that something was wrong, really wrong. So, you kept an eye on Anna, watching as she talked casually but her voice had a slight shiver. It was obvious that she was hiding it.
You also saw that she was growing tired way too fast, you asked Kistoff if Anna and you could sit on Sven. He obviously agreed, seeing how the orange-haired girl was shivering yet acting like nothing was wrong. The rest of the ride, you sat behind Anna, arms around her waist. Anna was almost asleep, her back leaned against your chest as her head rested on your shoulder.
Until you two reached a forgotten cabin, slowly waking the girl up and getting off of the reindeer, ofcourse helping Anna get off of it. You slowly entered it, seeing that it hasn't been used for quite some time. Anna looked around, admiring the place, before she suddenly fell to the ground, her body shivering even more, her hair was slowly growing white.
You quickly crouched down beside her, placing a hand on her shoulder as the other gently touched her braids with white streaks in it, "Anna, what happened to you? And don't tell me it's nothing, you're tired and shivering," you ordered her, your voice firm but gentle, trying to understand what was happening to her.
"It's Elsa, she didn't mean to hurt me. Before she went missing, we had a fight because I was worried for her- before she could calm herself, she hit me with her ice powers. But don't blame this on her, please," she pleaded, looking at you with those tired yet scared eyes. Her hands, that were now cold instead of her usual warm skin, gripping your wrists.
"But don't worry about me, we have to find Elsa. I will never forgive myself if she gets hurt," she adds, trying to stand up, but because of her weakened state, she practicly falls into your arms, too tired and cold to do anything.