
The beloved anime, “Demon Slayer“, is coming back with its long-awaited Infinity Castle movie. This trilogy film will wrap up the story, with the first installment set to release in Japan on July 18th, 2025. American fans will have to wait until September 12th, 2025, to catch it in theaters. Given that the Infinity Castle Arc is all about intense battles interspersed with emotional moments, numerous characters are expected to take center stage. Interestingly, Zenitsu Agatsuma, who seemed peculiar during the final stages of Hashira Training and has remained so since, will finally receive his due recognition.
Despite being among all the Demon Slayers confined within the Infinity Castle, Zenitsu stood out with his composed attitude – a surprising change for someone known to be easily excitable. What’s more, his icy stare before preparing to fight one of the Upper Moons touched many hearts. Fans who have read the manga for some time have seen Zenitsu’s transformation in the final arc, but for those only watching the anime, they find themselves captivated by him. The accolades showered upon Zenitsu even reached his voice actor, Shinomo Hiro.
Zenitsu’s Voice Actor Reflects on Shifting Fan Perception of the Character

I’m witnessing an intense build-up for the upcoming “Demon Slayer: Infinity Castle” in Japan, as the release date approaches swiftly within a week. On July 11th, 2025, the anime hosted a Pre-Release Prayer Event at Zojoji Temple in Tokyo’s Minato Ward. Hanae Natsuki, voice actor of Tanjiro Kamado, and Shinomo Hiro, Zenitsu Agatsuma’s voice actor, were among the attendees, joined by most of the cast members.
At the gathering, Hiro expresses his feelings of being deeply moved. Initially, he received remarks like, “Here’s the loud one.” Now, however, he’s overjoyed that he managed to develop Zenitsu through trial and error, and that the character has gained so much love from fans. (Based on Mantan Web)
When Hanae jokes if he’s happy enough, Hiro responds dramatically, “Maybe not? Nezuko-chan!!”

From the moment Zenitsu debuted, there has been much debate among fans about him. His initial encounter with Tanjiro was turbulent, yet they managed to establish a good rapport. Zenitsu is quick to frighten, prone to shouting, and tends to cause a stir wherever he goes. However, it’s important to note that he possesses considerable strength, even though he primarily fights while unconscious during sleep.
Previously, he would sometimes shine, but his accomplishments were frequently overlooked, with people more inclined to view him as a boisterous individual. Nevertheless, during the Hashira Training Arc and Infinity Castle, opinions about him transformed dramatically. The forthcoming movie promises to shed light on the cause of this sudden transformation, as well as showcasing his most impressive moment in the series, thus exposing the full extent of his abilities.
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2025-07-13 04:10