Viking AU

Viking AU (also known as Dragon Rider AU depending on the story) is an AU (Alternate Universe) within the Rise of the Brave Tangled Dragons universe and the Rise of the Brave Tangled Frozen Dragons universe. In the AU, Rapunzel, Merida, Hiccup and Jack Frost are all portrayed as vikings. Because it is not canon, ideas for this AU are shown through fanfiction, fanart, and other fan-made works.

About this AU
In this AU, the big four are portrayed as Vikings. Because Hiccup - one of the original members of the big four - is infact a viking, this AU usually involves itself within the plot of the How to Train your Dragon series, setting the characters as members of the vikings of Berk or at least from tribes somewhere in the Barbaric Archipelago, though this is not required.

Hiccup Horrendous Haddock III
Because he is already a viking, Hiccup most commonly plays himself (much in the same way that Jack Frost plays himself in the Seasons Guardians AU), acting as future/current chief of the Hairy Hooligans and leader of the Dragon Training Academy.

Jack Frost
In some scernarios, Jack usually portrays a viking incarnation of his original human self as either a Dragon Killer-in-Training or as a Shepherd given his crook. Sometimes this incarnation of Jack dies in the same way that he does in the film, becoming Jack Frost after saving his sister.

In other circumstances, Jack is portrayed as the old nordic legend Jokul Frosti, providing a mythical angle to the overall story.

Merida DunBroch
Due to her masculine, tomboyish attitude, Merida is most often portrayed as a Shieldmaiden in the same vein as Astrid.