Zuko is the former prince of the fire nation. he has a younger sister(Azula) who is super talented when it comes to FireBending. his mother disappeared from his life when he was quite young and Zuko doesn't know what had happened to her. his father always favored Azula. after Zuko spoke out of place in a certain meeting once, his father(Ozai) challenged Zuko to an Agni-kai, a FireBending duel. when Zuko refused to fight his father he received a permanent scar on his face and was banished from the fire nation. for years his only goal was to capture the avatar so he could regain his honor until, at last, he joined the avatar and defeated his father. Zuko is now the new Firelord.