5 Strongest Demons in Demon Slayer, Ranked

From the shadows, a hierarchy of evil rises that makes even the bravest demon slayers tremble. Many demons have appeared throughout the anime series, but only a select few have truly stood as pillars of power.

The strongest demons in Demon Slayer aren’t always obvious at first glance. Some hide tremendous power behind deceptive appearances. Let’s rank the five strongest demons who have made their mark on the series, plus a bonus entry that might surprise you.

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5. Thunder’s Fallen Prodigy – Kaigaku

A tragic villain! As one of the strongest demons in Demon Slayer, Kaigaku’s back story hits hard since he was once Zenitsu’s fellow mate in training. After failing to become the Thunder Hashira, he turned to Muzan for a quick power boost.

He is especially dangerous for his unique combination of Thunder Breathing techniques and demonic abilities. His Electrokinesis Blood Demon Art makes him a nightmare to face in battle. He becomes the Upper Moon 6 after the defeat of Gyutaro and Daki.

4. The Fist of Destruction – Akaza

No one stands in Akaza’s way in terms of pure martial prowess. As an Upper Moon 3, he’s earned his reputation through countless victories. Among those was the victory over the Flame Hashira, Kyojuro Rengoku. His Destructive Death technique, born from the Soryu Style of martial arts, makes him nearly unstoppable in close combat.

Even when faced with both Tanjiro and Giyu simultaneously, Akaza holds on his own with frightening ease. His combat skills and regenerative abilities place him firmly among the most powerful demons.

3. Sunlight Defiant Demon – Nezuko Kamado

If you fall for her cuteness, there’s no harm but beware of the strength she possesses. Nezuko isn’t just Tanjiro’s sister, but also one of the strongest demons in Demon Slayer. She has the unique ability to survive in sunlight, something even Muzan himself couldn’t achieve after centuries of trying.

Her Combustible Blood technique is devastating against other demons while leaving humans completely unharmed. This rare combination of powers, along with her ability to maintain her humanity despite being a demon, makes her a truly exceptional case.

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2. The Frozen Smile – Doma

Doma as Upper Moon 2 hides his terrifying power behind a playful facade. His Cryokinesis Blood Demon Art allows him to generate and control ice with devastating effectiveness.

He is a dangerous demon because of his immunity to wisteria poison, eliminating one of the demon slayers’ most potent weapons. Doma’s carefree attitude annoys even his fellow Upper Moons. But his combat record speaks for itself –he’s eliminated numerous Hasira throughout his existence.

1. Moonlight’s Ancient Shadow – Kokushibo

The strongest demon in Demon Slayer among the Twelve Kizuki is undoubtedly Kokushibo. Being the Upper Moon 1, he’s spent centuries perfecting his craft, making him nearly invincible. His mastery of Moon Breathing techniques, combined with his demonic Cresent Moon Blades, creates a lethal combination.

Even the mighty Stone Hashira Gyomei Himejima struggled against Kokushibo’s power. His centuries of experience fighting demon slayers has made him intimately familiar with their techniques. 

Bonus – Muzan Kibutsuji

Technically, Muzan Kibutsuji is in his own class. As the original demon and creator of all others, his power level exists in another realm. His near-invincibility and Biokinesis make him the ultimate opponent in Demon Slayer.

The strongest demons in Demon Slayer portray the incredible depth of power hierarchy within the series. The five ranked demons have proven themselves to be formidable opponents, pushing the favorite demon slayers to their absolute limits. These demons represent some of the most memorable and powerful antagonists in the modern anime-verse.