Symphony of Shadows (KNYxOC)

In a world full of demons, the one who survives is the one who hears the threat before it appears.

Kanade was just a street thief, the "Rat of the District," whose sole weapon was her absolute pitch. But one attempt to pick the pocket of the Sound Hashira, Tengen Uzui, changed everything. Instead of a criminal, he saw an uncut diamond in the filthy orphan.

Now she is his Tsuguko. She survived the Hellish Selection at age 14 to become a Slayer. Yet her path to the top was anything but straightforward. Having undergone a painful physical transformation and shifted her combat style from a "silent assassin" to a crushing "silver fortress," Kanade Otowa is ready to claim her place among the Hashira.

She is older, taller, and far more experienced than the rookies. She is bold, strict, and deadly dangerous. And when the music of battle resounds through the Entertainment District, it is her blades that will play the final chord.

//I do not own the world of Kimetsu No Yaiba, the rightful owner is Koyoharu Gotouge. This is fanfic, and the only characters I made are the ones introduced in the "OC" chapter//.