Who killed Muzan?

Muzan Kibutsuji, the main antagonist of Demon Slayer: Kimetsu no Yaiba, is killed by Tanjiro Kamado, the series' protagonist, along with the help of several other key characters. Here's a breakdown of how it happens and who contributes to his defeat:

1. Tanjiro Kamado:

Tanjiro plays a crucial role in Muzan’s defeat. During the final battle in the Infinity Castle, Tanjiro, who has gained immense strength and power throughout the series, is one of the main fighters against Muzan. He uses his Breathing Techniques, especially Sun Breathing, which is revealed to be the original form of all demon-slaying techniques. This ability allows Tanjiro to inflict serious damage on Muzan, weakening him significantly.

However, Tanjiro doesn't defeat Muzan alone. His efforts are supported by the Hashira (Pillars), other Demon Slayers, and the surviving members of the Demon Slayer Corps.

2. The Hashira (Pillars):

The Hashira, particularly Kanao Tsuyuri, Sanemi Shinazugawa, and Gyomei Himejima, all play a significant role in battling Muzan. They inflict critical injuries on him during the battle. While Muzan regenerates rapidly, the combined effort of the Hashira significantly weakens him, creating an opening for the final blow.

3. Nezuko Kamado:

Nezuko, Tanjiro’s sister, also plays an important role in the battle against Muzan. After Muzan attempts to kill Tanjiro, Nezuko’s blood, which has some mysterious properties due to her resistance to sunlight, helps tip the scale in favor of the Demon Slayers. Her actions help Tanjiro, giving him the strength to keep fighting and striking Muzan.

4. Muzan’s Final Defeat:

Ultimately, Muzan’s death comes about when Tanjiro delivers the final blow, empowered by his Sun Breathing and the combined efforts of all the Demon Slayers. However, Tanjiro is severely weakened by Muzan's final attack, and he only survives thanks to the assistance of his comrades. As Muzan’s body deteriorates, he is finally killed by the Demon Slayer Corps, marking the end of his reign of terror.

5. The Aftermath:

After Muzan’s death, the world is finally freed from the reign of the demons. However, Tanjiro, who was severely injured in the battle and was temporarily turned into a demon himself due to Muzan's final act, is saved by the efforts of his friends and family, especially Nezuko. With Muzan's death, the curse of demons is broken, and the Demon Slayer Corps begins to rebuild.

Conclusion:

Muzan Kibutsuji is killed by Tanjiro Kamado, with the help of the Hashira and the other members of the Demon Slayer Corps. Their combined efforts, along with Nezuko’s help and the use of Tanjiro’s Sun Breathing, ultimately lead to Muzan’s defeat and the destruction of the demon race.