On a clear summer night in the Fire Nation, a baby girl was born to the governor Hotaru and merchant daughter Natsuko, two wealthy fire-benders. Upon seeing her exquisite brown eyes, the two parents decided to give their daughter a life of elegance, thus naming her "Miyabi." A name then decided the firebender's journey to fulfillment.
Although her parents were overjoyed to have her, Miyabi's grandfather was unpleased; he'd always spot a flaw to criticize the child. A first-born girl was already a shame for the family; things will be much worse she couldn't be a fire bender. A year after Miyabi's birth came another child, a son named Ryo; his purpose was to please her grandfather.
Fortunately, at the age of five, the little girl was able to showcase her prowess. While playing in the manor garden, the heiress, out of fury, shot bright red flames out her palms and burned her potential kidnapper's torso; luckily, her guards heard the excruciating scream and were surprised to see it was the heiress' doing. In fact, this is when the family started to be proud of their little prodigy. While Yuu was given a normal extravagant life, Miyabi was suddenly piled with training. She was schooled to dance with fire, fight with fire, and most of all, destroy with fire; Miyabi had her childhood suffocated in flames (not literally).
As the years passed, Miyabi began to understand the cruelty of the world and accepted it. With two Syndicate members as parents, she was able to witness murder plots, cheating, and other evil acts. Instead of being disgusted, she was interested in how easily the rich could get away from their crimes. Taking pride in efficiency in her strives, she began to be less emphatic towards others and more self-seeking; of course, she has a small list of people (just a person) she is loyal to.
Being part of a high-class family of merchants, Miyabi was only told to "look pretty;" however, she was too ambitious to be a wallflower. Miyabi was tired of interacting with the rich hypocrites. Late at night (starting the age of nine), this firebender will wear a Kabuki mask and sneak out of her room into the night. She would visit an old fire sage's cottage in the forest and play Chinese chess; on some nights, he would teach her to play with fire. She quickly befriended the old man's grandson Kyung-Min as well. The two children caused havoc in their search for self-actualization.
The next years of Miyabi's life were expected. With excellent teachers, Miyabi performed traditional fire ceremonies, rituals, and theatrics to please her grandparents. Having the best beauty products money could afford, Miyabi became lovelier by the day to please her parents. If there was one thing considered significant by Miyabi, it was the death of her old friend; the old man left Miyabi with his grandson Kyung-Min, who was also a son of a restaurant owner; the two teenagers continued to enjoy late nights together until the eathbender left.
A few months ago, Kyung's father Ryuu invited Miyabi to temporary freedom, proposing for reconciliation and better education in Republic City. Through much persuasion and little knowledge of their daughter's true reasons, Miyabi's parents agreed. Along with her pet Katsuho, this firebender then changed into middle-class clothes and rode a ship to Republic City. Her main mission: represent the Kasai family in the urgent Syndicate meeting.