Azula is a highly skilled and ruthless fire bender in "Avatar: The Last Airbender." She's the younger sister of Prince Zuko and a formidable antagonist, known for her strategic brilliance and mastery of blue fire. Azula's complex personality reveals a deeply troubled character with a history of manipulation, seeking power and approval from her father. As the series progresses, her descent into madness adds layers to her character, making her both a compelling villain and a tragic figure.