Summary
- Episode 21 highlights Muzan’s creation of ruthless minions through people in dark phases, leaving a lasting impression.
- “The Smell of Enchanting Blood” delves into Muzan’s psyche and reveals the man he fears, offering rare insights.
- “The Hashira Unite” captures the emotionally charged confrontation between Muzan and Kagaya Ubuyashiki.
Koyoharu Gotouge’s Demon Slayer features many great and unforgettable characters, each with a unique backstory. While quite a few of them leave a lasting impression, very few can come close to the progenitor of demons, Muzan Kibutsuji.

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Driven by his desire for immortality and world domination, the Demon King has committed countless massacres over the centuries and has been the source of untold human misery. As a ruthless villain, Kibutsuji plays a key role in shaping the story’s conflict and its simplistic but emotionally stimulating war between good and evil. While Muzan has featured in many episodes of Demon Slayer, these seven are arguably the best.
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Season 1, Episode 21: Against Corps Rules
Muzan’s Old Connection With Rui
- IMDb rating: 8.6
- Arc: Mount Natagumo Arc
After Water Hashira Giyu Tomioka decapitates Rui on Mount Natagumo, memories of his human life suddenly rush through his mind, filling him with grief and sorrow. While he has undoubtedly made many mistakes in his past life, Against Corps Rules also highlights how Muzan takes advantage of people going through dark phases in their lives to create his army of ruthless minions.
The episode leaves a lasting impression by familiarizing viewers with the tragic circumstances that create demons and Kibutsuji’s terrifying manipulative powers.
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Season 1, Episode 7: Muzan Kibutsuji
Kibutsuji Meets Tanjiro
- IMDb rating: 8.6
- Arc: Asakusa Arc
Suspense, drama, action, and mystery—Muzan Kibutsuji is an intense episode that offers fans a glimpse of the Demon King’s powers. Ever since Tanjiro’s family was mercilessly murdered and his sister turned into a demon, he has been waiting for the day when he will finally get to face the progenitor of demons.
The heavens are not punishing me. Despite the hundreds, thousands of humans I’ve killed, I’ve been let off the hook. And I have never seen a God or Buddha over these thousand years.
Kamado’s wish is granted sooner rather than later when he runs into the Demon King himself at a busy market. Shocked to see Muzan pretending to live the life of an ordinary family man, Tanjiro is disgusted and struggles to contain his rage over Kibutsuji’s deception. The episode covers the epic confrontation in an engaging and suspenseful manner, further laying the groundwork for Muzan and Tanjiro’s rivalry.
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Season 1, Episode 8: The Smell Of Enchanting Blood
Demon King Struggles With Haunting Memories From The Past
- IMDb rating: 8.3
- Arc: Asakusa Arc
The Smell of Enchanting Blood is a fascinating episode that follows Muzan after he manages to get away when Tanjiro openly confronts him in a market. Seemingly upset by the incident, he walks through a dark alley when a man mocks him for his pale skin.

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Muzan soon loses patience and kills the man with one punch. As his relatives confront the Demon King, Kibutsuji proceeds to brutally murder both of them. He then instructs Yahaba and Susamaru to bring him the head of the demon slayer with “hanafuda-like earrings.” The Smell of Enchanting Blood is one of those rare episodes that delves into Muzan’s psyche and reveals the only man he fears.
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Season 3, Episode 1: Someone’s Dream
Muzan Meets Upper-Rank Demons
- IMDb rating: 8.6
- Arc: Swordsmith Village Arc
Following Gyutaro and Daki’s deaths, upper-rank members of the Twelve Kizuki are immediately gathered in the Infinity Castle by the Demon King. Apart from failing to find the Blue Spider Lily and track down Kagaya Ubuyashiki, Muzan’s most trusted allies have disappointed him on several occasions.
All that lives must die. Only feelings are eternal and undying. That is true. I do not remember a single human being I have killed. Flesh dies and that is the end. However, their feelings passed on and never fell to ruin and have even defeated me. I have witnessed that fact with my own eyes and I was so moved that I trembled.
Someone’s Dream centers around Kibutsuji’s first meeting with an upper-rank demon in over a century. As demon slayers suddenly appear to gain the upper hand, Muzan becomes desperate and uneasy. The episode brilliantly captures the tension and the gravity of the situation.
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Season 1, Episode 26: New Mission
Muzan Punishes The Lower-Rank Demons
- IMDb rating: 8.8
- Arc: Rehabilitation Training Arc
After a fierce battle on Mount Natagumo, Tanjiro and his friends focus on their rehabilitation training, but Rui’s death leaves a void in the Twelve Kizuki, and Muzan is infuriated by the repeated failures of the Lower Moon.

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Frustrated and furious, Muzan assembles every other lower-rank demon to teach them a lesson. New Mission is an intriguing episode that shows the Demon King’s cruelty and absolute control over his subordinates.
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Season 4, Episode 8: The Hashira Unite
Muzan Meets Kagaya
- IMDb rating: 9.7
- Arc: Hashira Training Arc
Very few people have troubled Muzan as much as the Demon Slayer Corps’ 97th leader, Kagaya Ubuyashiki. Naturally, the Demon King grew to hate him and desperately looked for any clues that would facilitate their confrontation. His wish was finally fulfilled as the demon slayers were busy with Hashira training, and Kibutsuji managed to track down Kagaya’s residence.
The one thing I hate is change. Changes in circumstances. Changes in body. Changes in emotion. In most cases, every change is degradation. It is decline. The one thing I like is permanence. If something doesn’t change for an eternity, it’s in a perfect state.
Determined to end their rivalry himself, Muzan set out to confront Ubuyashiki alone, not realizing that Kagaya was waiting for him. The Hashira Unite is an emotionally charged episode filled with tense moments that brilliantly capture one of the most pivotal confrontations in Demon Slayer.
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Season 3, Episode 11: A Connected Bond: Daybreak And First Light
Muzan Chases Immortality As Nezuko Conquers The Sun
- IMDb rating: 9.4
- Arc: Swordsmith Village Arc
A Connected Bond: Daybreak and First Light focuses on the final moments of the battle in Swordsmith Village, following which Nezuko conquers the sun. As Muzan learns about it, he finally realizes that he can overcome his biggest weakness and achieve his ultimate goal of immortality.

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Aside from dramatically escalating the final war between humans and demons, the episode also offers viewers a glimpse of Muzan’s life as a human and reveals how he turned into a demon.
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