What if Zuko had a second sister, one who bore more dragon blood than the rest of her siblings. The Dragon blood grew stronger with each child. Zuko took the mind of the Dragon, Azula the power, and the youngest Tatsu the Heart and Soul of the Dragon. She follows her Oldest Brother into his exile with her Uncle. Even as a Dragon Shifter she left a cushioned life for her brother. She is often sent for by her father which are often ignored (Much to Zuko's annoyance). She stays by Iroh, learning her firebending and what it means to be an Imperial Dragon of the people.