Jaw-Long was once known as The Conquering Emperor, When Bai was killed by the impostor, Jaw-Long was there to claim her soul into his body to be her first host but tricked her using a magical stone called the Harboring Gem. Where he was able to lock her away deep in his mind. Unlocking her abilities for his own use and with his alliance to the Dragon Prince of the Northern Sea. He was known to be a strong foe able to best the Monkey King in combat. He was then defeated by his own brother known as Bolin. Who managed to tap into his mind after successfully reaching enlightment and allowed Bai to come forth and take over Jaw-Long's body. Tearing him apart in the process. He currently resides in the mind abyss of Bai and all her hosts. Waiting till he can regain his power. It seems it'll be sooner than anticipated...