Jinju

Jinju was an Air Nomad living in the Southern Air Temple before the War. A boy around Aang's age, he was apparently one of the less popular boys at the temple and was often picked last for team sports, probably due to his odd behavior towards the other children and his unkempt appearance.

History
Not long before Aang locked himself in the iceberg, he created and taught his peers a new Airbending trick, the air scooter, which was a sphere of air upon which one could ride, and the other children soon created an accompanying game. When Aang asked to play, he was denied due to the fact that he was the Avatar, giving his team an unfair advantage. As Aang left, Jinju was picked last to play on one of the teams.

It can be assumed that Jinju was killed during the genocide of the Air Nomads by the Fire Nation.

Trivia

 * Jinju is the only named boy in the Air Nomads, except Aang.