Azula ( Avatar the last Airbender )

Azula was a princess of the Fire Nation, daughter of Fire Lord Ozai and Ursa, younger sister of Zuko, and older half-sister of Kiyi. She was a key adversary of Team Avatar,[5] chasing Avatar Aang and her banished brother far across the Earth Kingdom accompanied by her then two best friends, Mai and Ty Lee.

A firebending prodigy, Azula was manipulative and obsessed with power. She was a skilled strategist who orchestrated the coup of the Earth Kingdom capital, Ba Sing Se,[6][7] and halted the invasion on the Day of Black Sun.[8]

Azula harbored deep mental instabilities, believing her mother loved Zuko more than her.[9] Raised by her father in an environment without a mother-figure, Azula had to be nothing less than perfect in her father's eyes in order to gain affection and attention from him. After the betrayal of her two closest friends Mai and Ty Lee, these instabilities were brought up to the surface.[1] Upon the arrival of Sozin's Comet, Azula was soon to be crowned Fire Lord;[10] however, her defeat at the hands of her brother Zuko and Katara caused her to suffer a complete mental breakdown.[11]

Following her emotional breakdown, Azula was put in a mental health facility to recover,[12] though she eventually joined Team Avatar on their search for Ursa, as part of her secret agenda to betray them and usurp the throne from Zuko. At this quest's completion, however, Azula escaped the team's supervision.

Sometime after her exile, Azula returned to the Fire Nation Capital in secret. Having finally accepted that she would never be Fire Lord, Azula resorted to manipulating Zuko so that she could rule through him. Gathering a group of female supporters, she took on the guise of the mythical Kemurikage to intimidate Ukano into threatening Zuko. When that failed, Azula and her followers resorted to kidnapping children in the capital, setting the city into civil unrest. Though Zuko and his allies were able to rescue the children, Azula and her followers escaped.Princess Azula was born to Prince Ozai and Princess Ursa in 85 AG.[2] Azula grew up with all the riches, splendor, and privileges of royalty in the Fire Nation. Her sharp wits and the fact that she was a firebending prodigy gained her great attention and acclaim, which quickly made her Ozai's favorite child.[2] Her father began raising her as his true heir from an early stage, taking her into his confidence and educating her in politics. Azula later attended the Royal Fire Academy for Girls, where she met and befriended Mai and Ty Lee, two daughters of Fire Nation noblemen.[13]Even though Azula and Zuko had a decent relationship in their early years,[14] the siblings grew apart as they got older due to their parents' behavior. While Azula was clearly favored by Ozai, she felt that her mother loved Zuko much more than her, creating a rift of jealousy between her and Ursa and Zuko. As a result of this resentment as well as Ozai's influence, Azula became increasingly cruel and manipulative, often bullying Zuko and feeling happy over the latter's misery.[14][15] She also manipulated her friends Mai and Ty Lee.[15] As result of her growing tendency toward malice and a desire for perfection, Azula craved power to keep others close to her and avoid loneliness.[15][16]

When she was ten, Azula's life greatly changed. Her cousin Lu Ten was killed in the Siege of Ba Sing Se, and Ozai subsequently attempted to convince Azula's grandfather Azulon to change the succession. Azula eavesdropped on their conversation, and thus learned that Azulon had orded Ozai to kill Zuko in retaliation for his scheming. The girl went on to gleefully warn her brother to flee the palace, though Ursa noticed their exchange and thus learnt of Azulon's order. Ursa subsequently murdered Azulon, allowing Ozai to take the throne and going into exile. At the time, Azula felt satisfaction over her father's rise to Fire Lord and Ursa's disappearance.[15][14] Without her mother's protection, however, Azula was molded by Ozai into the perfect weapon and heir, negatively impacting her mental health.[16]