Steven Universe AU

Steven Universe AU is an alternate universe usually within Rise of the Brave Tangled Dragons universe and Rise of the Brave Tangled Frozen Dragons universe. In the AU, Hiccup, Jack, Merida, and Rapunzel exist within the world of Steven Universe.

About this AU
In this AU, the Big Four exist within the same universe as the Cartoon Network series Steven Universe.

Here, they could either be humans or Gems - a magical alien race of polymorphic gemstones (their Gem equivalents being "Gemsonas" of the characters). They usually play as members of the Crystal Gems, a group of Gems who rebelled against the Gem home-world and became the guardians of Earth and the humans that live on it.

Hiccup Horrendous Haddock III
Should he be a Gem, Hiccup is often portrayed as Jade for his affinity for the color green, "his" weapon being a Gem-based version of his fire-sword Inferno. In other circumstances, he would instead weild a Gem-based equivalent of his gronkle-iron sheild.