Demon Slayer: A Feast for the Gluttonous

[Dark story + play the pig to eat the tiger + immortal protagonist + causal law + multiple personalities + bonds forged through blades + ultimate twist] Alternate title: Demon Slayer: The Demon-Eating Doctor Who Ate Muzan's Flesh from the Start Katsuragi Ken is a “demon eater” who has lived from the Sengoku era to the present day. By devouring demons, he steals their power and memories, disguising himself under different identities as he roams the world. He witnessed Yoriichi Tsugikuni's sun, guided Kokushibo into corruption, kept Tamayo imprisoned as his companion, and treated the Upper Rank Demons as toys. Having lived too long, he found his joy in directing tragedies and savoring the “ultimate delicacy” of humanity's collapse, until he himself became a character in the play. He thought death would sever everything, but after being reborn, he discovered that he had gone from director to actor, and that he had rewritten the endings everyone had expected. As four hundred years of karmic ties converged, as the Demon King Muzan descended into madness over him, as the Demon Slayer Corps' old wounds remained unhealed, and as every piece moved according to its ordained fate, the one who had directed it all wrote an ending to the script with his own hand, one no one could have foreseen.