Final Fantasy AU

Final Fantasy AU (also known as FF AU) is a popular AU (Alternate Universe) within the Rise of the Brave Tangled Dragons fandom. In the AU, Rapunzel, Merida, Hiccup and Jack Frost play roles of the characters or their job classes from the 15 (and many more to come) Final Fantasy games. This can be considered an offshoot to Fairy Tale AU, Sci-Fi AU and Arcade AU.

About the AU
In this AU, the members of the Big Four are portrayed the roles of the characters from one of the many fantasy or sci-fi story lines from the games or their job classes. Mage (White, Red Blue, Black or Time), Knight (Dark, Moogle, Mystic Rune or Onion), Sky Pirate, Viking, Blacksmith, Thief, Archer, Assassin, Soldier, Summoner, Ninja, Elementalist, Warrior, Samurai, Tamer, Hunter, Songstress, Gunner, Tinker, Geomancer, Dancer or Beastermaster.

The four can also be pleased in one of the many FF worlds where they can ride Chocobos, spend time and buy items from Moogles, come across crystals with power, travel and fight monsters that come their way with their skills or with the help of Summons. (Characters like Toothless, Baby Tooth, Marshmallow and Baymax can be portrayed as some of the summoning monsters.)

Hiccup Horrendous Haddock III
Hiccup's job(s) in the FF games can be Viking, Tamer, Tinker, Warrior, Black Mage, Blacksmith or a Beastmaster. He can also be cast as one of the four heroes from FFIII, along with Jack, Merida and Rapunzel.

Jack Frost
Jack has been given the job roles of a Blue Mage, Thief, Sky Pirate or an Elementlist. He can also be cast as a Guardian Cop from FFXIII, that later becomes a L'Cie with the Shiva Sisters (one of the many summons) as his Eidolon. Also for Jelsa he's cast a Tidus from FFX, while Elsa plays the Summoner, Yuna.

Merida DunBroch
Merida's skills makes her a Archer, Warrior, Samurai, Red Mage, Ninja or a Knight. Fans have also cast her with the role of Oerba Yun Fang from FFXIII, a l'Cie from Gran Pulse.

Rapunzel Corona
Fans have made Rapunzel a White Mage, Elementlist, Summoner, Thief and a Songstress. Fans have also cast her as Songstress Yuna from FFX-2, Oerba Dia Vanille from XIII and Aerith, the Cetra from VII.

Queen Elsa of Arendelle
Fans have cast her and Anna as Warriors or Geomancers and her as Lighting/Claire Farron, a Guardian Cop from FFXIII (That's becomes a Goddess in FFXIII-2 and a Savior in Lighting Returns) that came an L'Cie while trying to save her younger sister.

Fans have also cast her as Terra Branford from VI, while her ability that created Olaf, Marshmallow and the Snowgies makes her a Summoner or the ice summon monster, Shiva.

Princess Anna of Arendelle
While Elsa plays Lighting from the first or second part of FFXIII, Anna is cast as her sister Serah Farron. Anna is mostly seen as FFXIII-2 Serah with Kristoff as her lover Snow Villiers or her Time Traveling Partner from the future Noel Kreiss. While Olaf plays the lucky-charm Moogle, Mog.

Fans have also cast her as Yuna from FFX.