Gyatso

Monk Gyatso was the minor character of Avatar: The Last Airbender. Avatar Aang's guardian, mentor, and father figure before the beginning of the Hundred Year War, as well as a member of the Council of Elders. According to Aang, he was the greatest airbender in the world of his time.

Gyatso was known for his kindness and sense of humor. Though Aang learned airbending under him as part of his Avatar training, the monk always allowed time for fun and games, such as Pai Sho. In his earlier years, Gyatso also had a strong friendship with Aang's previous incarnation, Roku.

Gyatso was slain during the genocide of the Air Nomads, during which Fire Lord Sozin invaded the air temples. His remains revealed that he had managed to defeat many comet-enhanced Fire Nation soldiers before his demise.