Cinderanna

Tianna is the femslash ship between Anna and Cinderella from the Disney fandom.

Canon
As Anna and Cinderella are from different series, they have never met in canon.

While the Disney crossover film that serves as the Wreck-It Ralph squeal, Ralph Breaks the Internet, has online versions of the two known as "netizens", the inhabitants of the digital made world that lies within the real-life internet. Where they are two of the fourteen Disney Princesses that are from the expo-like Disney website, Oh My Disney.

Similarities and comparisons

 * They both appear as Disney Cameo characters in Ralph Breaks the Internet.
 * Both of their names have an "A" and an "N" in them.
 * Are two of the Disney based and owned characters in Once Upon A Time.
 * Even though there are two versions of Cinderella in the series, where the second Once Cinderella is of the show alone while the first Once Cinderella is based on both Disney's version of her and the fairy tale character they are drawn from.
 * Have lost their parents.
 * Were seen as children at the beginning of their films.
 * Are two of the limit time characters in Disney Magic Kingdoms.
 * Both get along with animals.
 * They both appear in the Kingdom Hearts series.
 * Cinderella is one of the first seven Princesses of Hearts, while Anna is one of the new chosen seven.

Fanon
While the exact origins of the ship is a mystery, it could simply be due to fans who enjoy doing crossover, femslash ships that involve the Disney Princesses within the Disney fandom.

Fandom
FAN FICTION
 * Anna/Cinderella (Kingdom Hearts) on FanFiction.Net
 * Ashley/Anna (Once Upon A Time) on FanFiction.Net
 * Ashley/Anna (Once Upon A Time) on FanFiction.Net