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Yun was the friend of Kyoshi and Rangi, and the earthbending pupil of Jianzhu. Talented, charismatic, and handsome, he was misidentified as the new Avatar after a long and difficult search. After the revelation of Kyoshi's identity as the true Avatar, Jianzhu felt the boy's usefulness had been exhausted, and allowed a vengeful spirit to carry him off in the mountains.


When Yun was around fourteen years old, he was discovered in Makapu Village by Jianzhu and Kelsang. A crowd had gathered in a corner of the town square, observing a child with a Pai Sho board hustling tourists and winning time after time. When Jianzhu noticed that Yun was repeatedly drawing and playing Avatar Kuruk's favorite strategies down to exact tile placement, he presumed that they had at last discovered the Avatar's next reincarnation.

At sixteen years old, Yun was prodigious at earthbending, but had yet to show any signs of bending the other elements. Despite this, Jianzhu was confident in his identification of Kuruk's reincarnation, and committed himself to teaching Yun all he found imperative to the world's then-Avatar.

Under the tutelage of Jainzhu, Yun underwent many rigorous tests; bending exercises, physical trials, meditation, as well as poison training. In between lessons, Jianzhu and Kelsang would regularly take Yun on trips around the world on the airbender's flying bison, Pengpeng, in order to meet important people from around the Four Nations. His two male mentors wanted to ensure Yun had a cosmopolitan upbringing, as the ideal Avatar was also a diplomat, never showing bias.

Dedicating his whole being to his Avatarhood, Yun spent sleepless nights poring over scholarly analyses of Yangchen's political decisions. He exhaustively memorized the names of every Earth Kingdom noble, Fire Nation commander, and Water Tribe chieftain among the living and three generations of the dead. Yun used forgotten texts to map the ancient sacred sites of the Air Nomads to such a degree that it even exceeded the knowledge of his airbending mentor, Kelsang.

When Kyoshi was revealed to be the true Avatar, Yun was devastated. Jainzhu, now only concerned with teaching Kyoshi, allowed a glowworm spirit to drag his body off into a dark tunnel.

Surprisingly towards the end of the story, Yun makes a reappearance in front of Kyoshi and Jianzhu at the restaurant where the two were fighting, looking like the epitome of health and as if he hadn't been dragged off by a giant spirit. However, Kyoshi feels there's something off about Yun in the way he smiles and acts, but at the moment is too focused on Jianzhu to pinpoint what it was. Without a word, he calmly picks up the rock, presses it against Jianzhu's chest and then forces it through his former mentor's body before it goes through his back which he grabs in his other hand to show the two. As he walks away, he seems to taunt Kyoshi with a smile as he hits the walls enough to alert the patrons of something going on before vanishing away. His current whereabouts are unknown.

Physical Description

Yun was described as a young man with with jade-green eyes, brown hair and a handsome face with sharp edges. He had an easy smile and warm eyes that twinkled with mischief. Later, having seemingly returned from the dead, his skin had a healthy glow, and he had neat stubble lining his jaw. There was something not quite right, almost inhuman about him, however.


Yun was generally a fun-loving playful boy, who liked to tease his friends Kyoshi and Rangi. He's also quite wise and takes his Avatar duties seriously when need be, even though his internal thoughts show his frustration at not being able to bend anything beyond earth. While he's charming and cheerful on the outside, he does feel insecure about his place as the Avatar and gets stressed out when Kyoshi is slowly revealed to be the real Avatar. Yun also tends to shield his feelings from others, seen when Jianzhu was trying to figure out whether or not Kyoshi was the real Avatar and Yun lied about saying he'd be happy if Kyoshi was proven to be the true Avatar when in reality it absolutely crushed his spirit.

After he's taken away by Father Glowworm, he's not seen again until he arrives at the restaurant where Jianzhu and Kyoshi are having their silent battle. However Kyoshi feels like something is off about Yun, despite his placid smile and glowing health. He then calmly kills Jianzhu, seems to taunt Kyoshi with a smile and then hits the wall of the restaurant, causing it to shake noticeably to the patrons inside; whatever change happened to him, he's no longer the Yun Kyoshi used to know.


  1. Yee, F. C. (author), DiMartino, Michael Dante (author). (July 16, 2019). Chapter Two, "Nine Years Later". The Rise of Kyoshi. Amulet Books.
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