The Demon Slayer: Mugen Train movie stands as a remarkable success within the anime film realm, largely attributed to the presence of Flame Hashira Kyojuro Rengoku as a guest star. For those eager to delve deeper into Rengoku's character after experiencing the film, good news awaits. An extended edition of the movie dedicates an entire episode to Rengoku, set just before the events of the film.
Following its theatrical run, a decision was made to dissect the film into episodes and broadcast them on Japanese television. This strategic move aimed to catch up viewers who had been following the series on TV but had not witnessed the film in theaters. In the process, a brand-new demon slayer rengoku episode was crafted, solely centered on Rengoku, enriching his character development and offering insight into his circumstances right before embarking on the iconic train journey.


Demon Slayer Anime Expands Rengoku's Character Arc:
The episode kicks off by introducing a new demon terrorizing the Mugen Train, known as the Slasher due to his gruesome penchant for dismembering victims, unless he decides to devour them instead. In his role as a Demon Slayer Rengoku takes it upon himself to confront and eliminate this menacing Slasher. To accomplish this, he purchases a substantial number of boxed lunches from a concerned vendor, who is anxious about the Slasher's threat. These meals serve as his ticket to infiltrate a maintenance building where the Mugen Train is undergoing repairs, leading to a harrowing showdown with the demon who proves to be exceedingly agile, complicating matters further with a hostage in tow.

While the episode's plot may come across as somewhat 'monster-of-the-week,' reducing it to that label would be a disservice to its true purpose. The episode's primary objective is to delve deeper into Rengoku's character, shedding light on how he amassed all those boxed lunches that Tanjiro and his companions discovered aboard the train. Rengoku solidifies his family's legacy as dedicated demon slayer rengoku, with a particular emphasis on his role as the Flame Hashira. A significant portion of the episode is dedicated to a crow messenger conveying the sentiments of the other Hashira towards Rengoku, surprisingly revealing nothing but admiration and respect.

From this episode, it becomes evident that Rengoku possesses an exceptional skillset, radiates kindness, maintains an unwavering optimism even in perilous situations, and possesses the innate ability to uplift those around him—an attribute that resonates throughout the movie with his interactions with the young Slayers. For avid Demon Slayer enthusiasts yearning for more insights into Rengoku's character, this episode is precisely what they've been waiting for. It's only regrettable that Rengoku's time in the spotlight was brief, as he undeniably had much to offer to the overall narrative of the series.

Kyojuro Rengoku Left An Indelible Mark On Demon Slayer, Unlike Anyone Else:
Despite his father's disapproval, Rengoku stood out as one of the series' most formidable characters. His epic battle against Akaza, an adversary no one else could best, marked a turning point. Akaza met his end only after confronting the overwhelming despair of his human memories, leading to self-destruction.

Throughout the various arcs of demon slayer rengoku, several Hashira were highlighted, beginning with Giyu and followed by Shinobu. However, it was Rengoku who took center stage in the Demon Slayer movie, and subsequent seasons introduced Tengen Uzui, Kanjroji Mitsuri, and Tokito Muichiro.

The manga delves even deeper into the heroic battles waged by all the Hashira against Muzan and the Upper Moons. In the end, only Giyu and Sanemi survived, while Uzui retired from the ranks. Each of the Hashira became fan-favorite characters as fans uncovered their intriguing pasts.
Nevertheless, none left as profound an impact on the story as Rengoku. His confrontation with Akaza illuminated the immense challenges that demon slayers faced. Furthermore, his parting words served as a wellspring of inspiration for Tanjiro, Zenitsu, and Inosuke to further hone their skills.

Notably, Rengoku hinted at the existence of the Sun Breathing Technique during his final moments. While the series witnessed numerous deaths thereafter, Rengoku's demise remained the most poignant and tragic of all.
In 2021, a prominent Demon Slayer fan book unveiled the opinions of the Hashira regarding each other. Rengoku stood as the sole character to receive praise from all his fellow Hashira and reciprocate it. Even Sanemi, known for his short temper, had nothing but commendation for him, solidifying Rengoku's exceptional legacy.

Conclusion
The Demon Slayer: Mugen Train movie's success owes much to Flame Hashira Kyojuro Rengoku's presence as a guest star. The extended edition of the film, turned into an episode, delves deeper into Rengoku's character and enriches his role in the story. While the episode may seem like a 'monster-of-the-week,' it serves the purpose of exploring Rengoku's background, personality, and the admiration he garners from his fellow Hashira.
Kyojuro Rengoku left an enduring mark on the series, with his epic battles and inspirational parting words. Among the Hashira, he stood out as a fan favorite and left a profound impact on the story. His legacy as a dedicated Demon Slayer and his hints at the Sun Breathing Technique make him an unforgettable character in the world of "demon slayer rengoku”.