An underrated moment in the Hashira training will have monumental consequences in Infinity Castle Arc

Demon Slayer's Hashira Training Arc is focused on the events that developed after Nezuko conquered the sun and two upper moons were killed in the village of Swordsmith. With immortality closer than ever before for Demon King Muzan Kibutsuji, prepares demon crusts for an existential battle that may very well define the future of humanity.

The bow focused on several important events, including the Hashira meeting led by AMane Ubuyashiki, Gyomeis Backstory, the gap between the Shinazugawa brothers and the relentless pursuit of the Demon Slayer Mark. But a small scene that may be overlooked by most fans will have a much greater influence on future events than anything else so far. It will not only transform one of the demon's Slayers but also affect an intense battle in Demon Slayer: Infinity Castle Trilogy in ways no one can predict.

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Zenitsu and the mysterious letter

Agatsuma learns his mentor's frightening fate

• Anime: Section 62, entitled “Stone Hashira Gyomei Himejima”

Ever since Zenitsu Agatsuma debuted, he has been very cowardly and annoying. As he improves dramatically as a fighter, his heroic remains the result of his subconscious programming and relentless training done under the watchful eyes of Jigoro Kuwajima. Even in Hashira Training Arc, Zenitsu causes unnecessary inconvenience and constantly complains about the hard workout.

Everything changes when he receives a mysterious letter when he trains under Stone Hashira Gyomei Himejima. At that time, the scene doesn't seem so serious. In fact, Zenitsu is busy with his usual discoveries, which hide the unfortunate nature of the message he is getting.

Through the mysterious letter, Agatsuma is informed that his mentor and former Thunder Hashira, Jigoro Kuwajima, committed Seppuku. As if this was not already horrible, Zenitsu also learns that the process was long and painful, as it turned out to be too difficult to cut off his mentor's head. In his last moments, Kuwajima endured unthinkable pain and suffering which he should have been implemented.

The butterfly effect of the letter directed to Zenitsu

Zenitsu was transformed as a fighter after Jigoro's death

After Zenitsu learned about Kuwajima's passing, he was understandably heartbroken. But instead of giving in for despair, he had an unexpected transformation that even surprised his close friends. Agatsuma stopped complaining about training or talking to someone. He isolated himself instead and focused on the goal he had set for himself.

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Interestingly, the letter also mentioned that Kuwajima committed Seppuku after learning that one of his disciples, named Kaigaku, had become a demon. This turned out to be an unbearable burden for him, and the former Thunder Hashira felt that death was preferable to living with the shameful storage room. Kaigaku continued to replace Gyutaro and Daki as the new Upper Moon Six.

Many years ago, when Zenitsu trained under Jigoro, Kaigaku used to ridicule him. So when he realized that the same bullying was responsible for the death of the only person who believed in him, Agatsuma was understandably frightened. Unlike the bullying, Zenitsu knew that he could not forgive Kaigaku this time and promised to take revenge.

In Demon Slayer: Infinity Castle Trilogy will focus on a whole war between Demon Slayer Corps and Muzan's underlines. While most Hashira and other demon Slayers will fight in groups, Zenitsu will confront his arch enemy Kaigaku alone. The drive by a sense of revenge and sadness, Agatsuma will drive its old bullying to look for any sense of regret for their actions.

But Kaigaku, who has lived a life driven by self -preservation, will refuse to throw a single tear for his old mentor that led him when he needed it most. Jigoro's brutal death and the incredible motivation will drive Zenitsu beyond his tolerance, and a brutal battle will follow. While most fans are happy about the fights involving Akaza, Doma and Kokushibo in Demon Slayer: Infinity Castle Trilogy, Agatsuma's struggle with Kaigaku will be equally exciting. It will shape the war with Muzan Kibutsuji and has far -reaching consequences.

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