Azula

Azula is a major antagonist in the cartoon series Avatar: The Last Airbender.

Origin
Azula was a somewhat unruly child growing up in the Fire Nation. She always held a fierce resentment of her brother, Zuko, and pined to impress her father with her firebending. Believing that her own mother thought her a monster, she became embittered towards most people, even her best friends.

Powers and Abilities
Azula is a master firebender who can shoot lightning at will. Due to an unknown reason, the fire she bends is blue, unlike other firebenders.