Agduna

Agduna is the het ship between Agnarr and Iduna from the Frozen fandom.

Canon
When Prince Agnarr visited the enchanted forest with his father and a few royal guards, he notices the forest's wind spirit playing with a Northuldra girl in the distance and begins to slowly make his way towards her, but before he could get a chance to have a proper look at her face, she gets spirited away by the wind spirit. Just before the Arendellians and Northuldra began to attack each other, shortly before Agnarr gets knocked unconcise in the chaos he witnesses his father's death. Once the Northuldra girl from earlier, Iduna, notices the defenceless Arendellian prince she decides to save him, despite what his people have just done to hers. With help from the wind spirit, the two were able to escape the mist that the enraged spirits cast upon the forest. Because of what happened in the forest and the mist that now surrounds it prevents people from either leaving or entering the forest, Agnarr becomes Arendelle's new King while the bad blood between their people forces Iduna to hide her Northuldra origins, as she begins to live a new life in his kingdom.

As the years passed since that fateful day, Iduna never told Agnarr that she was the one who saved him as they grew up from childhood friends to lovers, before becoming husband and wife. Because Iduna had choice to save the prince of her people's enemy that day, the spirits granted their first born daughter with magical powers over ice and snow, while Anna was born without magic. Even though either Agnarr or Iduna know why Elsa was born the way she was, it didn't stop them from loving their daughter as any parents would. One night when the two went to tuck their daughters to bed, they see them playing a game called "Enchanted Forest", in which gets Agnarr to tell Elsa and Anna about his time in a real Enchanted Forest, even though a part of Iduna didn't want Agnarr to tell them it. After Elsa accidently struck Anna, Iduna stands by Agnarr's decision to keep the sisters apart until Elsa regains control of her powers. Both Agnarr and Iduna have tried to help Elsa since that night, but her fears of hurting her family again kept her from approaching her parents, which saddens them. With little choice and hoping that Ahtohallan would be able to help them gain a better understanding of Elsa's magic, the two decide to seek out the memory holding river, while keeping their true destination and reason for their voyage a secret. As their ship sails across the dark sea, however, they get struck by a terrible storm that claims their lives, while they embrace each other one last time before they were swept away by the harsh waves.

Many years later, after their daughters uncovered Iduna's secret and how her love for Agnarr is proof that Arendellians and the Northuldra can live in peace with one another, along with Elsa using her ability to see the moments that Agnarr and Iduna had shared with one another, Queen Anna commissioned a statue of Agnarr and Iduna's young selves to be build in order to keep their legacies alive.

Moments
Frozen II
 * After Agnarr tells Iduna that he loves her, she decides to tell him the truth of her past. But it is unknown if she had indeed told him or had then decided to not tell him after all.
 * As young Iduna hangs upside down from a tree, she asks Agnarr what he is reading.

Deleted Scenes
In an earlier version of Frozen II's opening, a young Iduna is seen wrapped in a blanket with Arendelle's crest on it, before she sees a young Agnarr about to fall of the edge of a cliff and rushes over to save him. After he thanks her, the two get spirited away to the escape Arendellian camp. Just as Agnarr had lost a father, Iduna knew that she'll never see her mother again.

In another deleted scene that has Elsa showing Anna a moment of their parents that she saw in Ahtohallan, Iduna and Agnarr are seen talking about telling Anna the truth about Elsa and how their youngest daughter can help Elsa, along with them planning to do so once they get back from their trip.

One of the sequel's teasers has young Iduna and Agnarr playing with one another, before the wind spirit joins in to lend Iduna a hand in getting the better of the young prince.

Children
Elsa Elsa is Agnarr and Iduna's first born daughter and heir to their throne who was born with magical powers over ice and snow. Elsa's abilities were a gift from the four spirits of the Enchanted Forest, as they rewarded Iduna for rescuing Agnarr. For a long time either of them knew why their eldest was blessed with magic powers, Elsa seeking the answers to that very question allowed her to uncover the secrets of the past, along with learning a bit more about her parents, before and after she became the fifth spirit of ice. When Elsa learned that she is the reason why her parents went on the voyage that killed them, she began to blame herself for their deaths even though Anna tries to tell Elsa that it wasn't her fault.

Anna Anna is Agnarr and Iduna's second born daughter. When Anna was little her memories of Elsa's powers were taken from her mind after she got struck in the head by them. Her parents kept them apart for their safety until Elsa learns to re-control her icy magic. Many years later, Anna's love for Elsa helps her to master her powers and their sister bond became stronger than ever. Three happy years later, Anna gains the heart and wisdom of a leader from her time in the Enchanted Forest where she rallies the trapped Arendelle guards for her task of lifting the curse. After Elsa became the forest fifth spirit, Anna helps her sister to bridge the two worlds together by serving as their kingdom's new queen. To make sure that the Arendellian never forget the friendship they share with the Northuldra, Anna requests a statue of their parents' young selves to be made, since they and their daughters are proof that their people can get along with each other.

Fanon
After the first Frozen film came out the ship was a less popular ship of the Frozen fandom until their backstory being a big part of the second film's plot gained Agduna a lot more supporters. Which is why many of the ship's current fanwork has them as their young selves and imagining that their time growing up together would have been like, before their daughters were born. Along with imagining what it would have happened if the two had properly met in the forest, like the two had done in a few of the film's earlier teasers. A few fans of the ship are also hoping for a prequel film or short on the two during their youth, so they could see more of their shared moments together before Iduna became Agnarr's queen.

On AO3, the ship has 58 fanfics, while fanfiction.net has over 194, with only 29 placed under pairing. Along with Agduna having a reasonable size fanbase on Tumblr.

Fandom
FAN FICTION
 * Agnarr/Iduna tag on FanFiction.Net
 * Agnarr/Iduna tag on FanFiction.Net
 * Agnarr/Iduna tag on FanFiction.Net

DEVIANTART

TUMBLR

Trivia

 * Their young selves were first seen for a brief moment in the teaser trailer of Frozen II.
 * In the Once Upon A Time series, Iduna is called Gerda and was one of the three princesses of Arendelle where one of her older sisters has magical powers like Elsa.
 * Not much of her and Agnarr's relationship was seen in the live-action show, apart from showing their final time together before they were killed in the storm. Along with their daughters doing what they could to uncover the true reason for their voyage at sea.