Is Jiutian Xuan Nv the leader of the Great Emperor Wei Zi?

No. For nine days, Xuan Nv and Wei Zi were immortal couples, and they loved each other deeply. So they asked the emperor to enter the world first, willing to share half the disaster, willing to persevere and accept all kinds of sufferings in the world. When the robbery was finished, it was time to reunite with Emperor Wei Zi. They are lovers, not superiors and subordinates.