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Kimetsu no Yaiba Universe

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Zenitsu Agatsuma

General Info

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Job TitleDemon Slayer
Knows aboutBreath of Thunder Style
Alternate NameZenitsu
Character NameZenitsu Agatsuma
Member of OrganizationDemon Slayer Corps
Zenitsu Agatsuma is a prominent character in the Kimetsu no Yaiba universe, who is much loved for his relatability and depth. Despite his constant fear and self-deprecation, he has the power of a demon slayer and the heart of a true hero. He uses the Breath of Thunder style he learned from one technique, carrying on his master's legacy. This unique technique, enhanced by his exceptional sense of hearing, allows him to quickly outrun enemies, often while asleep. Zenitsu's growth and unwavering loyalty to his friends make him a valuable part of the Demon Slayer Corps. Despite her fearlessness, she always summons courage when it matters most, highlighting her true bravery and integrity.


Zenitsu Agatsuma, one of the main characters in the Kimetsu no Yaiba universe, is a lightning bolt and a member of the Demon Slayer Corps. Although initially fearful and pessimistic, Zenitsu possesses immense strength and courage that emerges from his unconsciousness.
Raised by a debtor, Zenitsu lived a rough and difficult life. This harsh upbringing contributed greatly to his inherent anxiety and self-doubt. However, after being rescued and guided by the previous Thunder Hashira, he gained great skills and mastered the art of lightning breath. Although his conscious state is often described as non-warlike, his unconscious self reveals an undeniably powerful fighting ability. This unique quality enhances the depth of his character and captivates the audience. Importantly, the angle of her split personality emphasizes her reaction to traumatic experiences and conveys a deep story of survival and resilience.
This blonde hunter also brings light humor to the series' often intense atmosphere. Despite his constant whining and easily frightened nature, he is willing to stand by his friends when it comes to proving his loyalty and bravery. Zenitsu Agatsuma is indeed a complex and very intriguing character in the story of Kimetsu no Yaiba, with a monstrous facade but a boldly roaring lion inside.


Zenitsu Agatsuma is the main character in the acclaimed shonen anime series Kimetsu no Yaiba. As a member of the Demon Slayer Corps, an organization dedicated to exterminating demons, Zenitsu plays a central role in the story.
Interestingly, Zenitsu is different from your typical shonen character. Consumed by his crippling fear and self-doubt, he often finds himself in a state of constant fear. Despite these limiting traits, Zenitsu has an unwavering sense of loyalty and has shown great courage when his friends are in danger.
He was born into a humble family and his life took a dramatic turn when he was struck by lightning and turned from black hair to the blonde we know. This tragedy marked the beginning of his journey as a Demon Slayer. Debt-ridden Zenitsu was taken under the wing of former Thunder Hashira Jigoro Kuwajima. Kuwajima trained Zenitsu strictly in the style of Breath of Thunder, although Zenitsu was only able to master the first form of Thunderclap and Flash.
But his manifestation of this single form is unmatched: he refined it to such an extreme that he created several variations of the same movement. Uniquely, Zenitsu only reaches his full demon slayer potential while unconscious, a recurring comical situation in the series. His subconscious exploits are in stark contrast to his conscious whiny self, making him a lovable fan favorite. Zenitsu likes women and harbors strong feelings for fellow Demon Slayer Nezuko Kamado. Despite their mostly platonic interactions, Zenitsu's romantic crush on Nezuko adds a touch of tenderness to her otherwise colorful personality. His journey involves growth and self-realization, transforming himself from a fearful and reluctant hunter to a courageous Demon Slayer worthy of his mentor Hashira's legacy. Zenitsu Agatsuma is the epitome of an unexpected hero, a symbol of courage and perseverance, born of desperation and survival.

Creation and Development

The creation and development of Zenitsu Agatsuma, a character from the Kimetsu no Yaiba universe, showcases a complex mix of tension and humor. Initially introduced as a cowardly character, Zenitsu's transformation into a menacing demon slayer is carefully fleshed out throughout the series.
Zenitsu creator Koyoharu Gotouge explains that the genesis of his character stems from a desire to introduce an unconventional personality to the Demon Slayer corps. According to Gotouge, the creation of Zenitsu was a complex process aimed at balancing his fear and hidden fighting prowess.
He was originally a fun character, prone to comical outbursts and irrational fear to provide comic relief in a dark and intense demon-slaying story. But Gotouge wanted to explore a subversion of the trope, rooted in the notion of "hidden power in fear." Zenitsu's development is steadily evolving, revealing its true potential over time.
Also, it was very important to Gotouge to create an empathetic story that could serve as the basis for Zenitsu's phobia and justify his powerful demon-slaying power. So his past as a borrower and his training under the former Thunder Hashira explain his fear and excruciating hard work.
Aesthetically, Zenitsu's character design resonated with his unique personality. With blonde hair caused by lightning and clothing that symbolizes her connection to the style of Thunder Breath, her distinctive appearance emphasizes her identity.
Zenitsu's development throughout the series matches the complexity of its creation. Despite her constant fear, Zenitsu shows moments of courage and tenacity, drawing strength from her desire to protect others. As he trains and perfects his unique technique, he takes on a more heroic role, transforming his character traits into an exciting contradiction: a fearsome warrior struggling to defeat his own demons. These layers of fear and courage make Zenitsu a complex character that adds significantly to the depth and diversity of the Kimetsu no Yaiba universe.

Character Profile

A prominent figure in the Kimetsu no Yaiba universe, Zenitsu Agatsuma is known for his unique character traits and impressive abilities. At first glance, he can be considered a coward due to constant anxiety and fear. Either way, when it comes time to face his opponents, he displays a shocking contrast between courage and strength.
Zenitsu was born with the talent to listen beyond human capabilities and uses this unique ability to detect threats and attacks better than others. Despite his typically shy demeanor, he has a strong sense of responsibility for his duty as a demon slayer and is eager to prove his worth. Zenitsu is well versed in the Breath of Thunder style and only uses the first style, Thunderclap Flash. During times of extreme stress and panic, Zenitsu has been known to faint and unconsciously fight at an incredibly high level. His extreme speed combined with the accuracy of his Thunderclap Flash makes him a more powerful opponent than he realizes.
Although often anxious, Zenitsu has a kind heart. He cares deeply about his friends and would do anything to protect them. He is particularly fond of his comrades in the Demon Slayer Corps, especially Tanjiro and Nezuko Kamado.
Zenitsu's journey through the series is both exciting and full of surprises, reflecting his transformation from a mild-mannered individual to a sinister demon slayer. He stands out as a unique character in the Kimetsu no Yaiba universe and intrigues the reader with his unpredictable and dynamic personality.

Story Arc

Zenitsu Agatsuma's storyline is characterized by tremendous growth and self-discovery. A big part of her journey revolves around overcoming her fears and believing in herself. Presented as a shy and whiny character, Zenitsu's insecurities often lead him into serious situations. He expresses a deep fear of death, causing him to panic and brood before every encounter with demons.
Zenitsu has a unique ability to remain terrifying despite his cowardice. He didn't know he had a subconscious alter ego that wakes up unconscious or asleep. This personality change transforms Zenitsu into an incredibly powerful swordsman capable of thunder and lightning, a lightning technique passed down in the family by his former mentor Kaigaku.
His defining moment comes during the Infinity Castle arc. Zenitsu confronts his former mentor-turned-demon, Kaigaku. He always had an inferiority complex against Kaigaku, who was skilled and more confident. Remembering all the times he was belittled, he overcomes his fear of facing Kaigaku despite his fear of standing.
Despite his hatred for Kaigaku, Zenitsu thanks him in his final moments, making Zenitsu's victory bittersweet. The fight ends his inferiority complex and shows his growth into a more confident and confident person.
During the journey, Zenitsu falls in love with Nezuko Kamado, the demon sister of the protagonist Tanjiro Kamado. His love for her adds a softer, more romantic side to his personality, showing his desire to protect her and make her happy, even if it means conquering her inherent fears, thus developing depth in her character. In conclusion, the Zenitsu Agatsuma arc is a showcase of great character development, starting with a scared and insecure character who has overcome his fears and doubts to become a resilient and reliable Demon Slayer. His story captivates audiences, making him one of the most beloved characters in the Demon Slayer universe, Kimetsu no Yaiba.

Cultural Impact

Zenitsu Agatsuma, despite his initial display of cowardice and self-doubt, was extremely popular with audiences and contributed greatly to the cultural impact of the Kimetsu no Yaiba universe. His complex personality and hidden power have made him a fan favorite, with many identifying with his fear and anxiety, yet reveling in his unexpected bursts of courage and immense strength.
Zenitsu's character development is also a beacon of growth and overcoming personal obstacles. His evolution from a scared demon slayer to a confident and essential member of the team is a reminder that everyone has hidden depth and potential. Zenitsu's journey captivates the audience, reminding us that fear does not define the whole human being, and that courage can emerge in the most unexpected circumstances. His unique "Thunder Breath" fighting style, inspired by the iconic visual representation of thunder and lightning in Japanese culture, also increased his character's appeal and visibility. This influence has reached a wider cultural landscape, with fans around the world replicating his iconic moves in a variety of creative expressions, including art, cosplay and digital content.
This palpable impact only reinforces the important place Zenitsu and the entire Kimetsu no Yaiba universe hold in modern anime culture. As such, Zenitsu Agatsuma embodies the series' motif of dealing with personal demons and hints at the transformative potential of conquering one's fears.


Zenitsu Agatsuma, the heroic character from Kimetsu no Yaiba, leaves a lasting legacy. Not initially a brave or skilled fighter, Zenitsu's journey demonstrates the power of perseverance and personal growth. He constantly doubted himself, but eventually became one of the most feared Demon Slayers. Despite his overwhelming fear of death, Zenitsu's loyalty to his friends and sense of duty always trumped his instincts for self-preservation. His relentless effort and determination set him apart and allowed him to master the one and only style of Thunder Breath, a legacy he inherited from his master. The sound of his lightning movements served as a beacon of hope on the battlefield. But Zenitsu's legacy isn't just about his fighting skills. It's a testament to overcoming fears and personal limitations and setting an example for future generations of Demon Slayers. His personal transformation from a fearful and frightened man to a man who defied the monstrous demons will remain as his greatest legacy.