Mario AU

Mario AU (also known as Super Mario Bros AU) is a AU (Alternate Universe) within the Rise of the Brave Tangled Dragons fandom. In the AU, Rapunzel, Merida, Hiccup and Jack Frost are placed in the world of Super Mario Bros. This could also be a sub-scenario for Arcade AU.

Queen Elsa
Elsa's blue dress, blond hair and being a noble can easily her as Rosaline.