Jingtai was born and raised on Earth, among a small village of human refugees who survived the initial plague and Synd takeover. Though the village had managed to stay hidden for many years, Jingtai was still a child when the Synd found them. Most of the village was slaughtered, including Jingtai's parents, but a wanderer who had made his home there saved as many of the children as he could. This wanderer, Li Chi-Ang, revealed himself to be a first-generation Synd—therefore, one who had once been human.
He took the children to safety and settled them into a new life, raising them and teaching them all he knew. Still, it wasn't long before the Synd found them again, and this time Jingtai was the sole survivor. Carrying a piece of the Synd who killed his teacher with him, Jingtai has dedicated his life to avenging his family.