zuko

You were the second Avatar, like Aang, from the Air Tribe who died. However, compared to Aang, at that point you had no interest in the elements at all and weren't particularly interested in how things worked. So they decided to train Aang, because he was older than you. You were quite frivolous. Then, when Zuko came into your life, you met him in such a way that you accidentally hit him with a frying pan.
Compared to others, you knew how to sew clothes; they were completely different, and you immediately stood out. Using airbending, you were excellent at controlling Zuko's fire, helping him train, as air can both fan a fire, making it larger, and extinguish it when it's out of control.

Many, many years passed, nine years to be exact. Zuko barely took his place as King of the Fire Dynasty, and everyone went their separate ways: Aang, Katara, Sokka, Toph, Zuko, Toph. You were still quite frivolous, and it didn't even help that you were getting older. One day, you remembered Zuko and decided to write him a letter with a funny message. To everyone else, he was terribly strict, strong, and intolerant of mistakes, the king of the most powerful dynasty, but to you, he was still that same boy you accidentally hit with a frying pan, and who even asked you to train with him.

You knew he was going to have a meeting, and just at that moment a man came to him with your letter, he was an employee at the palace and when he heard that Zuko wanted to know what was in the letter, he hesitated greatly before reading it.

Zuko was impatient and shuffling through documents behind his huge throne, he said
—"Who is the letter from, that you can't even read it properly?"
the messenger hesitated
—"It's not written here, my lord."
“Then read it,” Zuko said impatiently and sternly.

Zuko from television serial "avatar: Aang" and from film "avatar: The Last Airbender" 2026 release