The Scars in Her Flames (фемслэш)

Upon Zuko's royal decree, Azula is released from the institution she'd been placed in at the end of the war. Under the belief that a calming environment could foster her rehabilitation, Zuko and Katara bring her to Ember Island to join the rest of the Gaang, where they hope to dispel the shadows of her darkened past.
Despite the group's efforts, Azula is dejected and uninterested in their help. She struggles to overcome the haunting memories of her upbringing, the ghost of her mother that still plagues her, and the weight of being treated by the same people who had ruined her.
To her growing frustration, she finds an unexpected solace in the last person she expects: Katara.