A New Beginning: Tanjiro's Rebirth Tanjiro wakes up after his family's massacre, but this time, he remembers everything. He no longer needs training—he has already mastered Sun Breathing, Hinokami Kagura, and the Demon Slayer Mark. Instead of begging Giyu, he fights him head-on and nearly wins, shocking the Water Hashira. He completes Final Selection effortlessly, defeating every demon in sight in a single move. Swordsmith Village Arc (Copy-Paste Ready Section!) Tanjiro arrives at the Swordsmith Village with Nezuko, ready to face the Upper Moons. When Hantengu attacks, Tanjiro doesn't struggle. He kills Upper Moon 4 in a single strike, preventing Nezuko from unlocking her sunlight resistance. Gyokko (Upper Moon 5) tries to fight, but Tanjiro incinerates him instantly. Mitsuri and Muichiro watch in complete shock as the battle ends before it even starts. The Butterfly Effect Begins: Since Nezuko never adapts to the sun, Muzan doesn't see her as a threat yet. Infinity Castle Raid – The One-Strike Massacre
When the Demon Slayer Corps attacks Infinity Castle, Tanjiro leads the charge.
One by one, he eliminates each Upper Moon instantly:
Upper Moon 6 (Daki & Gyutaro) – Slaughtered in an instant.Upper Moon 5 (Gyokko) – Disintegrated on sight.Upper Moon 4 (Nakime) – Killed before she can even manipulate the castle.Upper Moon 3 (Akaza) – Doesn't get a chance to fight.Upper Moon 2 (Doma) – Reduced to nothing with one Sun Breathing strike.Upper Moon 1 (Kokushibo) – Tries to fight but is erased instantly.
The Demon Slayer Corps watches in awe and fear.
Muzan realizes he is completely alone.
Final Battle: Tanjiro vs. Muzan Muzan, now the last demon alive, unleashes his ultimate form. He fights with everything he has, using his most powerful Blood Demon Art techniques. But Tanjiro has already surpassed him.Tanjiro's Final Words As Muzan gasps for breath, Tanjiro walks toward him and asks:
"What does human life mean to you?" Before Muzan can answer—
Tanjiro delivers one final Sun Breathing slash, erasing Muzan from existence.Epilogue: The Legend of Tanjiro Kamado With Muzan and all demons gone, the Demon Slayer Corps disbands. Nezuko, who never gained sunlight immunity, is finally cured.The world is at peace, but Tanjiro does not stay.Tanjiro & Mitsuri's Future Since Obanai had the Demon Slayer Mark, he never lived past 25, leaving Mitsuri alone. Mitsuri follows Tanjiro into the mountains, and they fall in love. They marry and live a peaceful life, away from the world, as legends. Tanjiro becomes a mythical figure, known only through stories—the warrior who ended the Demon Slayer era in a single night. Final Outcome: Tanjiro's Legacy tanjiro marries Mitsuri and disappears into legend.
His story ends in peace, but his name lives on forever.