My Frozen Guardian

When Elsa was born she was given a fantastic gift. But when she was little, she misused it and struck her sister, Anna. Elsa grew up in a lonely room with no socialisation other than her parents, until they died. Three years after their death Elsa is crowned Queen or Arendelle. She becomes angered by a decision Anna makes and shoots ice crystals from her ungloved hand. She runs off to the mountains, hoping to be alone. But her being alone also includes Jack Frost.