Idun

Iduna was the former Queen of Arendelle, the mother of Elsa and Anna, and the wife of Agnarr

After striking Anna with her ice magic, Elsa frantically called out for her mother and father, who took their children to the Valley of the Living Rock, in the hopes that the Trolls  could be of assistance. Though immediately concerned for Anna's safety, both Iduna and Agnarr also worried about Elsa's powers getting stronger.

The King of the Trolls, Pabbie, was able to heal Anna by removing all traces of Elsa's magic, going so far as to modify the memories of Elsa's magic. However, though the immediate danger had passed, Pabbie warned the royal family that the strength of Elsa's magic would only increase and that she would have to learn to control them or they would be dangerous.

As a result, Agnarr ordered the castle gates to be shut and had the two sisters separated, both for their safety and the safety of the kingdom. In the years that followed, Iduna and Agnarr were the only human contact Elsa had.

And during a storm at sea, Iduna and Agnarr perished when their ship was capsized by a storm at sea. A funeral was held for them, though only Anna attended.