I mean it’s a bit spoiler-y to do so, but this also came to my mind.
Zuko is the villain in the beginning. By the end, he has completed a redemption arc and is a good guy.
One could argue that he was always a good guy and was just clouded by his father’s ambition and the loss of his mother.
That’s basically what I meant, he was the main villain in the beginning, after all. Didn’t think about that this would kinda spoil it tho.
Yep, I agree with what you meant and it was the first thing that came to my mind when looking to answer the OP.
As for spoilery, i was just kinda warning about it. The phone client I use doesnt have a spoiler tag, not sure if the web client does.
Zuko, maybe?
Zuka was never the villain, it was always Ozai, or maybe Azula.
It definitely starts out with Zuko being the villain
