He's been sending her letters while in his decay. She's trying to forget he's ever existed. (Helsa/Iceburns set four years after Frozen. Rated T to be safe.)

She was left to whither under the cold embrace of her own magic,like a flower left to freeze under the duress of winter. Lying still like the perfect Sleeping Beauty, her clock ticks in haste as she turns into an ice sculpture. Only an act of true love can thaw a frozen heart. But if her sister's love is not enough, then whose is?