Please recommend a novel. The plot includes a female protagonist who is an ancient elf, and two male protagonists who are two avatars of an ancient demon. The modern reincarnation of the female protagonist travels back in time and becomes childhood companions with the two male protagonists.

The female protagonist is an ancient elf, and the two male protagonists are the two avatars of an ancient demon (it seems to be a snake demon or something). The demon and the elf live together. The demon likes the elf very much, but the elf sacrificed herself to save the world. The demon is also reincarnated into two people with the same appearance but different personalities. The modern reincarnation of the female protagonist transmigrated back to the past, but the transmigration was to meet the two male protagonists at different times when they were young.

Answer 1

I recommend the Eastern fantasy novel," Double Hearted Underworld Queen." The female protagonist was the ancestor of all gods in the universe, Emperor Haotian, who was transformed by his inner demons. The male protagonist was the Cold Demon Underworld King, who had two avatars. The male protagonist and the female protagonist would eventually be together after killing, escaping, happiness, hatred, and waiting.