She is a solitary protector of the demon sect,
He is a once-in-a-thousand-year-old immortal genius.
The two met when their doom came:
Therefore, he was her calamity, and she was also his calamity.
After reincarnation.
She became a Taoist fairy who was decisive in killing,
He became the most beloved young master of the Demon Lord.
Therefore, he is still her calamity, and she is still his calamity.