Shadowgirl1545
The Flame Hashira did not set his heart ablaze just to let it burn out.
When KyΕjurΕ Rengoku was defeated by Akaza, his soul didn't pass into oblivion. Instead, it was reborn into a world where superhuman "Quirks" are the norm. Now known as Izuku Midoriya, he carries the same vibrant, flame-streaked hair, the same unbreakable spirit, and the legendary mastery of Flame Breathing.
To the rest of the world, his blinding speed and scorching blades are just a powerful pyrokinetic Quirk. They don't know the truth: it isn't a Quirk at all, but a mortal art perfected through generations of blood and discipline. He is still the same boisterous, fiercely loyal warrior-only now, with his hearing fully intact, his booming voice is a little more controlled (though his love for a good meal remains entirely unchanged).
But Izuku's ancient soul catches the attention of a power older than Quirks. When All Might passes him One For All, the vestige world awakens instantly. The past wielders recognize the heavy burden of a Demon Slayer; they know the history of the Corps, and they offer the reincarnated Hashira a level of profound respect no other successor has ever received.
Armed with two lifetimes of power, Izuku steps through the gates of U.A. High School expecting a fresh start. What he doesn't expect is a ghost from his past sitting in Class 1-A.
Enter Kanae Kocho.
Reborn with all her memories intact, the former Flower Hashira is ready to carve out her own path as a hero. When their eyes meet on day one, the past and present collide. Together, the two former pillars must navigate a society built on modern heroes, while proving that the ancient, unyielding will of the Demon Slayer Corps can never be extinguished.
~I'll tell you the story of a warrior
Who fought the fight of love (ooh)
With every wound he wore
He raised his sword and
Marched through tears and blood (ooh)~
~ Story Of A Warrior (John Michael Howell)