What Happened to Zenitsu in the Hashira Training Arc? Why Did Zenitsu Become Serious? What Was in the Letter to Zenitsu?

What Happened to Zenitsu in the Hashira Training Arc?

In the Demon Slayer: Kimetsu no Yaiba's Hashira Training Phase, Zenitsu Agatsuma trains with Tanjiro Kamado, Inosuke Hashibira, and fellow Demon Slayer Corps members.

As the Hashira Training Phase nears its conclusion, Zenitsu is spotted perched atop a rock, facing Tanjiro with his back turned, his forehead stained with blood. This phase marks a significant change in Zenitsu's behavior, as he adopts a more grave and serious attitude compared to his earlier training sessions.

Following the discovery of a cryptic letter, Zenitsu appears to be pursuing a different objective than Tanjiro and his companions. The last image of Zenitsu, seen in the series finale, reveals him devoid of emotion as he plunges into the Infinity Castle, seemingly driven by a crucial mission. This transformation has transformed Zenitsu into a demon hunter, setting the stage for a major confrontation in the series' conclusion.

Why Did Zenitsu Become Serious?

Zenitsu turns gravely serious following the catastrophic event of his master's passing, with Kaigaku's involvement playing a crucial role. This occurrence brings about a transformation in him, instilling a more resolute and concentrated approach in his engagements. He experiences a notable shift in his behavior, adopting a more grave demeanor throughout the story. This evolution begins before the attack on the Infinity Castle, during which Zenitsu presents himself in a distinctly serious manner, despite Tanjiro's apprehensions for him. This shift is initiated by a letter Zenitsu gets from Chuntaro, unveiling the tragic passing of his master, Jigoro Kuwajima, and Kaigaku's role in his death.

The news of his master's demise, along with Kaigaku's part in it, deeply impacts Zenitsu, causing a transformation in his personality. In his confrontation with Kaigaku, Zenitsu exhibits a harsh and furious tone, showcasing a more grown-up side, in contrast to his typical cowardice. This abrupt change astonishes his past mentor, as Zenitsu displays a more serious aspect of himself, revealing a newfound level of skill and determination.

What Was in the Letter to Zenitsu?

The letter Zenitsu finds in Demon Slayer: Kimetsu no Yaiba delivers heartbreaking information regarding the demise of his guide, Jigoro Kuwajima. Jigoro, who was once a member of the Thunder Hashira and the instructor to both Zenitsu and Kaigaku in the Thunder Breathing Technique, committed seppuku (ritual suicide) as a way to atone for Kaigaku's treachery. This note was written by Chuntaro, Zenitsu's faithful sparrow tasked with handling tasks and communications for him within the Demon Slayer group.

Demon Slayer: Kimetsu no Yaiba Wiki

Demon Slayer: Kimetsu no Yaiba is a Japanese animated TV show based on the manga series by Koyoharu Gotouge. Following the conclusion of the third season's finale, it was revealed that a fourth season would focus on the "Hashira Training" storyline from the manga. This fourth and ultimate season, named Demon Slayer: Kimetsu no Yaiba – Hashira Training Arc, is based on the 15th and 16th volumes (chapters 128–139) of the manga. It debuted on May 12, 2024, with a one-hour episode. The season concluded with a one-hour special broadcast on June 30, 2024.

Streaming Platforms

Demon Slayer: Kimetsu no Yaiba is available for streaming on Netflix and Crunchyroll.

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