Chey

"fire"

- He's the first person ever to leave the army and live. I'm the second, but you don't get to be a legend for that.

Chey was a former Fire Nation Captain, disciple of Jeong Jeong, and a master of using explosives. He held the title of being the second person to desert the Fire Nation army and live, after the aforementioned Admiral.

History
Chey used his expertise in explosives to destroy countless villages, all in the name of the war. But after seeing so many innocent people's lives ruined by his actions, Chey began to question the purpose of the war and his role in it. Three years ago, he became the second person to desert the Fire Nation army and live. When he heard about Jeong Jeong, Chey went in search of him, hoping to gain some of his spiritual knowledge. Chey had been a part of Jeong Jeong's tribe for the last couple of years, trying to learn all he could from the great master, and gain enlightenment himself.

When Aang and his friends went to a Fire Nation festival, it was discovered that Aang was the Avatar, and the three friends quickly attempted to escape from Fire Nation soldiers. Fortunately, their escape was aided greatly by Chey. As they flew away on Appa, Chey explained he served a firebending master named Jeong Jeong who had abandoned the Fire Nation. Chey led the group of three to Jeong Jeong's camp within a forest, but were intercepted by Jeong Jeong's followers.

They were then led to camp, and there Aang attempted to try and learn firebending from Jeong Jeong. After the camp got attacked by Admiral Zhao, everyone left. Chey had been in the forest and knew nothing of what had happened. Chey returned to the campsite only to find it deserted. Though Chey's character was not seen at any other point of the series, he did later appear on a Fire Nation Wanted poster, which may imply that he was still eluding the Fire Nation by the time of the second season.

His final fate after the War remains unknown.