She was Bai Ge, the youngest daughter of the Cat King of the demon realm and its Sixth Princess. Though born with nine tails, she was never loved by her father. Her difficult birth nearly cost her mother her life, and from then on, her father despised her.
Unable to take human form, she could barely get by in the cat realm and was constantly bullied. At last, she gathered her courage and ran away from home.
She had only meant to bask in the moonlight atop Mudan Peak, but a god found her and took her to the divine realm. And so her already miserable life as a cat grew even more tragic, beginning at that very moment.