Xiao Cha, a demonic cultivator from the Chaotic Star Sea, primarily practiced the Profound Yin Technique. He was once a Nascent Soul stage expert, but was betrayed by his disciples, Ji Yin and Ji Xuan, and sealed within an ancient cultivator's ruins. Han Li and his companions, while exploring the ruins, fell into a trap set by the cultivators. Xuan Gu seized the opportunity to steal Qu Hun's body and escape.

In the Void Heaven Palace, Xuan Gu used the Nine-Bend Spirit Ginseng pills as bait to lure Han Li into joining him, while simultaneously trying to persuade Han Li to comply with the Ji Yin Ancestor's wish to take him as a disciple. Deeply cunning, he remained inactive while the others fought over the cauldron in the inner hall, harboring a hidden agenda.