Nezuko’s Inability to Heal Kagaya Ubuyashiki: An Explanation for Demon Slayer Fans

Nezuko’s Inability to Heal Kagaya Ubuyashiki: An Explanation for Demon Slayer Fans

Nezuko Kamado’s Blood Demon Art, featured in Demon Slayer, is highly praised for its effectiveness in battling demons. Her signature pink flame is particularly useful for neutralizing poisons and launching attacks. However, despite its strength, her abilities do have limitations, as seen in the case of Kagaya Ubuyashiki’s curse.

Despite possessing the ability to burn demonic toxins and heal wounds inflicted by demons, Nezuko’s flames proved ineffective against Kagaya’s hereditary illness. In order to understand why Nezuko was unable to cure Kagaya, it is necessary to closely examine his sickness, which, unlike a demon, is a tragic curse inherited from the Ubuyashiki family.

Demon Slayer: Understanding Nezuko’s Blood Demon Art

The Blood Demon Art possessed by Kamado Nezuko allows her to instantly produce pink flames from her blood. These flames possess a unique power that is highly effective against demons and other Blood Demon Arts, yet they pose no danger to humans.

Despite their regenerative abilities, demons are vulnerable to flames, as evidenced by Daki’s slower healing from burns in comparison to regular injuries. Moreover, Nezuko’s Blood Demon Art proved effective in counteracting Gyutaro’s poison, ultimately saving the lives of Inosuke Hashibira and Tengen Uzui.

Kamado Nezuko (Image via Studio Ufotable)
Kamado Nezuko (Image via Studio Ufotable)

Nezuko’s flames possess the remarkable ability to temporarily transform Nichirin Swords into a bright red hue, thus amplifying the strength of their strikes. Yet, the downside of utilizing her Blood Demon Art is that it can induce drowsiness if overused.

Demon Slayer: The Limitations of Nezuko’s Healing Abilities on Kagaya Ubayashiki

Gyutaro as shown in the Demon Slayer anime series (Image via Studio Ufotable)
Gyutaro as shown in the Demon Slayer anime series (Image via Studio Ufotable)

During the Entertainment District arc, Gyūtarō, one half of the Upper-Rank Six duo, used his toxic blood to poison both Inosuke and Tengen Uzui. The poison was incredibly deadly and would have resulted in their deaths if not for Nezuko’s intervention. She utilized her Blood Demon Art, specifically the Blood Explosion technique, to save them.

Although primarily used for offensive purposes, this technique allowed Nezuko to ignite her blood into flames that only harm demons. In this situation, it proved to be effective. Nezuko’s flames possess a special ability – they selectively attack demonic cells without causing harm to humans.

Nezuko had healed Uzui Tengen (Image via Studio Ufotable)
Nezuko had healed Uzui Tengen (Image via Studio Ufotable)

Nezuko’s unique trait allowed her to safely eliminate the demonic poison from Inosuke and Tengen’s bodies. By destroying the demonic cells and neutralizing the poison, her flames effectively purified their bodies. Furthermore, the flames served the purpose of cauterizing wounds, sealing them and preventing any further harm.

Therefore, although Nezuko’s technique is not specifically a healing power, it still has a restorative effect in this situation. Nonetheless, it should be noted that Nezuko is not a healer, as her ability is only effective against demonic elements.

Kagaya Ubayashiki (Image via Studio Ufotable)
Kagaya Ubayashiki (Image via Studio Ufotable)

Through Nezuko’s inability to heal Kagaya Ubuyashiki, it is evident that her powers have limitations. Kagaya’s condition is a hereditary disease linked to the curse on the Ubuyashiki family, who are distant descendants of Muzan Kibutsuji, the original demon. The curse on their bloodline results in a debilitating illness that leads to the premature death of male members.

Despite following specific rituals, such as marrying women chosen by priests, the curse could not be fully eradicated and the illness continued to cause premature deaths, even in adulthood. Nezuko’s flames were unable to cure Kagaya’s condition as it was not caused by demonic influence, but rather a natural disease that could not be vanquished by her flames.

Final Thoughts

A snapshot from the anime series (Image via Studio Ufotable)
A snapshot from the anime series (Image via Studio Ufotable)

Although Nezuko’s Blood Demon Art was successful in neutralizing demonic toxins and treating injuries, it was unable to cure Kagaya Ubuyashiki’s inherited, non-demonic illness. This differentiation emphasizes the restrictions of her powers and emphasizes the profound, intimate curse plaguing the Ubuyashiki clan, rendering Kagaya’s ailment beyond her capabilities.

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