An Intriguing Fan Theory: The True Identity and Origins of Demons in the Demon Slayer Universe

The Demon Slayer universe, a masterpiece woven by Koyoharu Gotouge, is filled with enigmatic characters and engaging lore, fostering endless theories among its passionate fan base. One such theory centers around the origins of the demons and the true identity of Muzan Kibutsuji, the primary antagonist and the first demon of this universe.

The Japanese title of Demons Slayer is “Kimetsu no Yaiba” meaning “Demon-killing blades.”

The Demon Genesis: A Mysterious Confluence

At the heart of this theory lies the question of demon genesis: What if the demons in the Demon Slayer universe are not solely the creation of Muzan Kibutsuji? The series posits that Muzan was the first demon, having been turned by a blue spider lily-extracted drug administered by an unknown doctor. Yet, this explanation seems incomplete, given the complexities of the demon existence. This fan theory suggests that the birth of demons might be a result of an unknown, ancient force coupled with Muzan’s transformation.

Muzan’s transformation into a demon was catastrophic, certainly, but could it also have been a latent response to a pre-existing demonic energy or curse? The idea here is that there might have been an ancient or otherworldly force that was waiting for a catalyst like the blue spider lily to manifest, and Muzan became the vessel of this manifestation.

Muzan Kibutsuji: A Vessel Rather than the Origin

As the oldest and strongest demon, Muzan is undoubtedly the cornerstone of the demon crisis in Demon Slayer, but what if he was not the origin but rather a vessel or conduit for a pre-existing demonic force?

This theory proposes that Muzan, while the first known demon, might not be the root of demonkind. The combination of the blue spider lily and Muzan’s biology could have awakened an ancient demonic entity that used him as a host, explaining his sudden transformation and tremendous power. It may also illuminate why he can create other demons: he’s not passing on his “own” demonic essence, but that of the entity using him as a host.

The Future of Tanjiro and His Friends

If this theory holds, it suggests a much larger conflict brewing beyond Muzan for Tanjiro and his friends. Assuming they succeed in defeating Muzan, the ancient demonic entity might seek another host, or worse, manifest in a more monstrous form. This could lead to an escalation of the demon crisis, even after Muzan’s fall.

Furthermore, it could significantly impact the destiny of Tanjiro and Nezuko. Nezuko, although a demon, has managed to retain her human consciousness, possibly hinting at a latent power or potential that could be pivotal in the future battles against this ancient entity.

Tanjiro’s distinct ‘Dance of the Fire God’ technique, originating from the Hinokami Kagura ritual, might hold a much deeper connection to this ancient force. The ritual might have been a protective measure against this entity, passed down the Kamado family line unknowingly, readying Tanjiro for this larger threat.

Conclusion

While this theory might sound like speculation, it brings an intriguing perspective to the Demon Slayer universe. It highlights the potential for grander lore, higher stakes, and more profound character developments. Though currently unverified, if anything close to this unfolds, the Demon Slayer series could take a thrilling leap, promising more intense, enthralling narratives for its ardent fans. In the end, only time (and Gotouge) will tell if any of these speculations hold true in the Demon Slayer universe.