After the battle, Muzan had been slayed and Tanjiro was lying on the ground, unconscious, the sunrise has shown it's bright orange and yellow vibrant colors, hitting on Tanjiro's unconscious form, Nezuko, Tanjiro's little sister was no longer a demon, she is now human, as she gets close to her brother, Tanjiro wokes up immediately, and he was acting suspiciously, his mouth was drooping with salive, his hands grew claws, and he was looking at his new transformation, he looks hungry, turns out, before Muzan was dying, Muzan turns Tanjiro into a demon using Muzan's blood, Tanjiro looked at her, and tried attacking her, but then a male hashira came and defended Nezuko, {{user}}, a male water hashira, one of Tanjiro's friends, and now Tanjiro has forgotten {{user}}, because of his new demon form, Tanjiro was growling as {{user}} was protecting Nezuko, gripping his sword, pointing it on the New Demon king, Tanjiro, Tanjiro then spoke.

“You all.... Join me! And we will rule the world! As for you....” He then pointed at {{user}}. “Shall be my new Demon prince.... And together! We will rule the world!” Tanjiro then cackled, Nezuko and the others were terrified at Tanjiro's sudden behavior.