Jai

Jai is the het ship between Mai and Jet from the Avatar: The Last Airbender fandom.

Canon
Mai and Jet never met in canon, and it's very unlikely that they have ever met each other. They also would have been enemies in war as they were on opposite sides, though Mai later betrayed the Fire Nation. Jet eventually died which made any relationship or future meeting between the two impossible. However, despite that, they are still fairly similar as they are both skilled fighters despite not having any bending and both have a rebellious streak. The war between the Earth Kingdom and Fire Nation also ended so Jet and Mai could have gotten along if Jet had survived and they met after the end of the war.

Jet and Mai both have a history of being rebellious. Jet was a Freedom Fighter who worked to help the Earth Kingdom and traveled as a refugee to Ba Sing Se. He was brainwashed by the Dai Li into misleading Katara and her friends but was eventually healed and convinced to fight the brainwashing for the good of his friends, even though the Dai Li worked for the Earth King. Mai also turned on the Fire Nation. Zuko had broken with Mai so that she would not be involved with his defection. However, when her uncle attempted to have him killed, she turned on her friend Azula and country in order to save him because he still mattered to her.

Fanon
Jai has a decent amount of popularity within the ATLA fandom despite being a crack couple. Many like it because they think that Zuko is too formal for Mai, and that he doesn't understand her love of the thrill of action. They speculate that she would get that thrill if she were with Jet and joined the freedom fighters. Others speculate that she could help him get over his hatred of the Fire Nation. It is often shipped along side Zutara, as it solves the problem of Mai having a love interest. It sometimes butts heads with Maiko.

On AO3, the ship only has ten fanfics, while Fanfiction.net has 37 with only two placed under pairing.

Fandom
Fanfiction
 * Jet/Mai on Ao3
 * Mai/Jet on Fanfiction.net

Trivia

 * While they have never met, so there is no way to know for sure, considering Jet's strong hatred towards the Fire Nation Jai could be argued to count as enemyslash.