Demon Slayer: Infinity Castle’s first film is currently playing in theaters, continuing to shatter records previously set by other anime films. For fans debating whether to experience it on the big screen, there are plenty of reasons to do so. Still, the key characters remain the strongest draw, as the film’s battles are built on threads carefully woven throughout the series.
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It isn’t just the Demon Slayers who have compelling reasons to fight in the movie, but the demons do as well. With the series having established its stories on a poignant foundation, fans can look forward to seeing what makes the Upper Moon Rank demons such a formidable force. The first film of Demon Slayer: Infinity Castle is confirmed to feature three major events involving seven key characters, along with others who play crucial roles in shaping the narrative from the very beginning.
Tanjiro Kamado, Giyu Tomioka, and Akaza For the Main Event

The first movie of Demon Slayer: Infinity Castle is titled Part 1: Akaza, and while this alone confirms the Demon Slayers’ confrontation with the Upper Rank Three demon, Akaza, as the main event, the trailer also strongly emphasizes this battle with Tanjiro and Giyu joining forces against the formidable foe. What makes this clash even more significant is that the foundations for Tanjiro’s confrontation with Akaza were laid five years ago in the 2020 film. With vengeance driving the fight, fans will witness Tanjiro and Giyu seeking to avenge Rengoku’s death, but will it be enough? That answer awaits on the big screen.
Shinobu Kocho and Doma, With a Possibility of Kanao Joining the Fight

Another major fight the film has highlighted since its first trailer is Shinobu Kocho, the Insect Hashira, facing the Upper Rank Two demon, Doma. However, the latest battle teaser confirms that this confrontation has been building for even longer than Tanjiro’s clash with Akaza. The teaser reveals the true reason behind Shinobu’s battle with Doma—revenge—since it is revealed that Doma killed her sister, Kanae Kocho. Yet it is clear that Shinobu alone is not strong enough to defeat him, and much like Tanjiro joining Giyu, Kanao Tsuyuri may step in alongside her master to exact vengeance. Discover what fate awaits them on the big screen.
Zenitsu Agatsuma and Kaigaku
Crunchyroll and Sony Pictures Entertainment revealed the final major event in the promo, featuring Zenitsu Agatsuma facing the Upper Rank Six demon, Kaigaku. A battle trailer released alongside the movie confirmed the main reason for this fight, showing that both Zenitsu and Kaigaku are Thunder Breathing users and students of Jigoro Kuwajima. Since Kaigaku has become a demon, the battle carries heavy personal emotions, and the trailer highlights a striking detail that underscores their differences: Zenitsu can use only the first form of the breathing technique, while Kaigaku can use the remaining five. This makes the fight deeply rooted in their shared past, and fans can look forward to seeing a side of Zenitsu unlike anything before, an experience worth witnessing on the big screen.
While the characters mentioned above will serve as the film’s key focus, fans can also look forward to appearances from Nezuko Kamado and Inosuke Hashibira, who have been central to the series from the start. Additionally, the trailer teases glimpses of the other Hashira in action, as well as the looming threat of the Upper Rank One demon and the ultimate antagonist, Muzan Kibutsuji, with his plans to abduct Nezuko. Demon Slayer: Infinity Castle’s first movie is a major installment in the series’ climax, and while fans have already been amazed by its stunning visuals, this high-budget film is set to surpass them, making it an experience that deserves to be witnessed in theaters.
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