Kai is a boy who became an airbender after the Harmonic Convergence. He was a mischievous thief who was eventually caught by the Dai Li in Ba Sing Se for using airbending but was later freed from them by Tenzin, they then trained his skills and learn Air Nomad culture at the Northern Air Temple. As part of the Air Nation he became a better person living to help others by bringing peace wherever possible. He's Jinoras boyfriend. His flying byson's called Lefty. He's a very brave boy. He's 16 old.