She was originally a piece of heaven that escaped. Because she couldn't bear the incarnation of all things after the creation of Pangu, she died and took her soul with her through time and space. He was sealed under the intervention of heaven and spent countless reincarnations in a state of confusion.
This time, Pangu accumulated enough power to wake it up.
But he felt distressed by the desolation in her eyes, and later sent her to the comic book world...
(The update may not be very fast, but it is guaranteed not to cause any problems)