Tadelsa

Tadelsa is the het ship between Tadashi Hamada and Elsa from the Disney fandom.

Canon
As Tadashi and Elsa are from different series, they have never met in canon. Even though a few Disney crossover video games could have the two cross paths with one another or get them added in the same team, by the player's choice.

Both Elsa and Tadashi are older sibling who lost their parents. Tadashi's science and Elsa's magic is what allowed them to create and live life to Baymax and Olaf. Their main antagonists presented themselves as a friend to Elsa and Tadashi.

Fanon
Tadelsa is considered to be a more popular ship in the Frozen/Big Hero 6 crossover fandom. Since Tadashi is a scientist he would probably be fascinated by Elsa's abilities and may want to learn more about them, leading to Elsa having a better understanding and control over them.

There are times where the ship is set in Arendelle, but are mostly set in San Fransokyo. A few manips also have Elsa in Go Go's clothing or a BH6 armour suit. The AU's typically have Tadashi part of BH6, while Elsa is typically a civilian girl. In a few versions of a Frozen AU, with the BH6 characters, Tadashi is sometimes seen as Elsa, while in Big Hero 6 AU with Frozen characters Elsa is sometimes seen as a Tadashi Hamada.

On AO3, the ship only has 14 fanfics while fanfiction.net has 42 with only 17 placed under pairing. Its fanbase on Deviantart, however, it a bit more larger than it is on the two fanfic websites.

Fandom
FAN FICTION
 * Tadashi/Elsa tag on FanFiction.net
 * Tadashi/Elsa tag on FanFiction.net

DEVIANTART

TUMBLR

WIKIS
 * on

Trivia

 * Elsa makes a appearance in Kingdom Hearts III, while Tadashi was only mentioned in it.
 * A few Frozen Easter eggs have been seen in the Big Hero 6 film.
 * In "The Present", a reference to the Frozen song, "Do You Want to Build a Snowman?", was made when Honey Lemon asks the villain if they want to build a snowman.