Opposite Twin Flames

In the twilight years of the Second Age, before war divided the world and darkness consumed Numenor, a lesser-known elven sorceress walked among the hidden circles of the Wise.
She was Lúmirel, a Maia of the stars, an apprentice of Varda, and the bearer of an ancient grudge.
She first crossed paths with Mairon, before he became known as Sauron, when he was still the Maia of Aulë. He was charismatic, brilliant, and maddening... and Lúmirel loathed him immediately.
Their first words were not spoken aloud, but kindled across the aether: a clash of wills, ideals, and unspoken recognition. Lúmirel, born of starlight and woven from rebellion, found herself drawn to Mairon's mind-structured, burning, aching with a desire to protect all imperfection. In her, he discovered an irritant, a fracture, and a fascination.
The feelings should have ended there.
Only they didn't

As the fires of war escalate, Lúmirel finds herself torn between the desire for vengeance and a doomed longing. She begins to realize what no elf dares to acknowledge: that the one who could ultimately destroy her might also be the only person who truly understands her.