Whose Demon God Is Not Frivolous?

"My life was given to you by the two of you, and I will return it to you today! From now on, the three of us will not owe each other anything! I hope that you will not provoke a war that will bring disaster to the six realms for a woman in the future, so that you can take care of yourself!" These were the last two words she left after she ended the war with her own life a thousand years ago. She vowed never to see the two of them again. But a thousand years later, the three of them were entangled again. Is it an unfinished fate thousands of years ago, or is it someone who did it deliberately? Some people hate because of love, and some people become demons because of love! How to resolve all this?