A/N: So this is set after Anna wanders out in to the cold to find Kristoff and is freezing over, you know when her hairs all white and it's windy and there are ships everywhere? Yeah, that. Right Anna freezes protecting Elsa, and Elsa's hugging the frozen Anna, Kristoff sort of freezes for a minute, looking lost and innocent and child-like. The italics mean it's a flashback. Anyway, this all takes place in that one Kristoff moment.
Kristoff was frantic; he needed to get to Anna. He was tearing toward her, but he wasn't close enough. He could only reach out for her as she threw herself in front of Hans' sword. He slowed to a halt. He was no longer breathing. He couldn't believe it. Not now, not to her!
We had been going into town, just me and Mom, Sven trotting happily along behind us. Our happy outing was interrupted by a deep rumbling. Mom had muttered the word "avalanche" before yelling at me to run. I hopped on Sven, who shot off like a bullet. I turned around on Sven to see Mom falling behind, a mountain of white frozen death closing in behind her. I begged Sven to turn around, but the reindeer, normally so compliant, was unstoppable. I watched Mom sprinting and stumbling over unseen obstacles, before a thicket of trees came between me and her. I gripped Sven's neck even tighter, and sobbed into his mane, just crying for everything to stop.
When the snow finally ceased chasing us, Sven stopped. I slid off him and turned around. Nothing but white greeted my gaze. "Momma?"
Dad had taken to bringing me to work with him, which was fine by me. The cabin had felt really cold and empty ever since Mom…well, let's just say, I wasn't fond of being alone. It was a perfectly ordinary day on the ice fields. All the ice cutters were together, but sort of isolated, in their own large, solitary circles. Dad had sat me down with Sven next to his sled for lunch. Dad always scarfed his food down swiftly, and that day had been no different. He went back to the patch of ice he'd been cutting while I finished eating. A crack echoed through the mountains, followed by an immediate splash. I looked up to see a hole where Dad had been working. "Dad!" I cried, and tried to get to where he'd been, but was caught by another cutter who'd run over. A crowd of men blocked my view of the hole.
"He fell in!" someone bellowed.
"He's been sucked that way by the current!" yelled another.
"Quick, cut a hole over there and we might be able to catch him!"
"Hurry up!"
A few well-placed chops later and the men were pulling a limp, shaking form from the water. The man holding me finally set me down, and I ran to him. "Dad?" I grabbed his coat and started shaking him. "Wake up! Please!" Dad's eyelids fluttered open, and then shut again just as quickly. Dad's loud, ragged breathing grew less and less audible until it stopped completely, filling the ice field with an eerie silence. I started to cry. "Daddy…"
She was gone. She was the last person alive he loved. His love wasn't a question even more. The time he'd spent with her was the happiest he'd ever been, but now she was gone. She'd been killed by the same wintery force that had killed his parents, and now she was the very thing he'd devoted his life to destroying. "Anna…"