Fics like Echoes of Sun and Moon

In a world where fate is written in light and darkness, the stars are beginning to move. Demon Slayer, Kiame Yuki, rises from obscurity to claim the mantle of the Star Hashira. Yet her greatest weapon is not the blade in her hands, but a Breathing Style born of dreams. Echoes of two twin swordsmen locked in eternal opposition. As the veil lifts, Kiame learns that the twins are not mere phantoms, but remnants of an ancient legacy tied to the origins of Sun and Moon Breathing. Legends from hundreds of years past that shaped the foundation of the Demon Slayer Corps. But not all legends are heroes. One brother's path leads directly into darkness, bound to the Demon King himself, and disturbingly aware of Kiame's existence. As whispers of destiny grow louder and demons emerge from the shadows, Kiame is pulled towards a confrontation written in the stars long before her birth. To face the truth within her dreams may grant her the power to change the course of the war. But it may also demand a choice that will cost her everything.

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