She is a complete badass who literally got put in the worst prison in the fire nation, became a protector of Kyoshi Island, fought the fire nation, before and after meeting team avatar, and won, all at age 15. If you were 15, would you be able to do that? I would say no. She is just clever enough to escape Boiling Rock, and help win against the fire nation, multiple times, and She is just a complete badass. That's all I need to say