Double Sided Suffering (Elsanna)

When 8-year-old Elsa Echolls noticed she had the power to control ice and snow, she couldn't be any more excited. Until she told her mother. After spending 8 years in a mental institution she was never quite the same. Elsewhere, 5-year-old Anna Christian would be tortured night and day, simply for existing. 9 years later, the girls meet, having more in common than they thought. AU