Anna

Anna is the youngest child in the royal family of Arendelle, whose older sister, Elsa was born with the power to create and control ice and snow. Despite this, the sisters become best friends and frequently use Elsa's abilities for their enjoyment. One night, after they create a snowman named Olaf in the throne room, Elsa accidentally strikes Anna in the head with her magic, and the impact knocks the latter out cold. The king and queen hurriedly take Anna to the mountain trolls for help. The trolls' leader, Pabbie, is able to heal her but at the cost of any memory Anna has of Elsa's magic. In an effort to protect Anna, the king and queen lock the castle gates and generally restrict Elsa to her bedroom. Confused by the sudden loss of contact by Elsa, Anna makes repeated failed attempts to draw her out of her room and ceases trying to rekindle their bond as they grow into young adults. The sisters become even more isolated from each other after their parents die in a shipwreck on a 2-week voyage to an unknown location.