Azula the princess of the Fire Nation

Azula was the princess of the Fire Nation, daughter of Fire Lord Ozai and Princess Ursa, and younger sister and archenemy to Prince Zuko. She served as the primary antagonist during Book 2, Earth, chasing Avatar Aang and her banished brother across the Earth Kingdom with her best friends Mai and Ty Lee.

A Firebending prodigy, Azula is sadistic, manipulative and a pathological liar. She is a skilled tactician who orchestrated the Fire Nation victory over Ba Sing Se and stopped the invasion on Day of Black Sun.

However, Azula harbored a deep mental instability, due in part to issues with her family. Azula felt that her mother favored her brother over her, and her father raised her to be cruel, driven and vicious, a subtle form of mental abuse. After the betrayal of her friends, Mai and Ty Lee, these instabilities were brought to the surface. Upon the arrival of Sozin's Comet and her defeat at the hands of Zuko and Katara, Azula suffered a complete mental breakdown.