Aurelsa

Aurelsa is the femslash ship between Aurora and Elsa from the Sleeping Beauty and Frozen fandom.

Canon
As Aurora and Elsa are from different series, they have never met in canon. In Ralph Breaks the Internet, after the two help the other princesses save Ralph, Aurora is seen standing beside Elsa, along with Elsa moving in closer to Aurora in one of the film's trailers of the Disney Princess group photo scene.

Both have blue dresses, that were made through magic. Maleficent: Mistress of Evil and Frozen II also has the two bring two worlds together, as they start their new lives and leave Maleficent and Annas' sides knowing that they'll be alright without them. When Maleficent and Frozen II has Aurora and Elsa learn that their father and grandfather are cruel kings, who had harmed the people of the magical worlds they became apart of, they choice to repair the actions of their crimes.

Fanon
This ship became a meme in Brazil after a video by Damares Alves, the Brazilian evangelical pastor and current Minister of Human Rights, Family and Women, reached the public saying that Elsa finished the first movie alone in the sand ice castle because she was a lesbian, and in Frozen 2 she would wake up to Aurora with a gay kiss.

MMD fanart of the ship commonly uses Aurora's MMD model from Kingdom Hearts: Birth by Sleep, while Elsa's model is fan-made. Since most of its MMD work was made before Elsa appeared in Kingdom Hearts III. There have also been a few Once Upon A Time fanfics that have their Once counterparts meet one another. There has also been fanart of Elsa waking Aurora up with a true love's kiss.

Because they made cameo appearances in Ralph Breaks the Internet, some fans feature Elsa and Aurora wearing their modern style clothes in their fanart. A few AUs of Sleeping Beauty/Maleficent sometimes portray Elsa as Aurora, because they both have blond hair and wear blue colored dresses. Like Aurora is with Maleficent in the remake, she would see Elsa as a person and not a monster. On AO3, the ship has only 5 fanfics, along with the ship having a small fanbase on both DeviantArt and Tumblr.

Fandom

 * FAN FICTION
 * Aurora/Elsa (Disney) tag on FanFiction.Net
 * Aurora/Elsa (OUAT) tag on FanFiction.Net
 * Aurora/Elsa (OUAT) tag on FanFiction.Net

Trivia

 * Both Aurora and Elsa appear in Once Upon A Time.
 * They are two of the netzine Disney Princesses seen in Ralph Breaks the Internet.
 * They are Princesses of Hearts in the Kingdom Hearts series.
 * They appear in the app game, Disney Magic Kingdoms