Despite sustaining life-threatening injuries, including a crushed eye and multiple internal wounds, Rengoku continues to fight Akaza. He refuses Akaza's repeated offers to become a demon, choosing instead to fulfill his duty as a human.

In the episode's climax, Rengoku uses his final strength to restrain Akaza as the sun begins to rise. Although Akaza manages to escape by severing his own arms, Rengoku successfully protects all 200 passengers on the train—a feat Tanjiro later declares a moral victory despite Rengoku's passing.

Before succumbing to his injuries, Rengoku gives Tanjiro vital information about the Hinokami Kagura and encourages him to "set your heart ablaze" and continue growing as a Demon Slayer. Production & Adaptation Details Kimetsu no Yaiba: Mugen Ressha-hen - Episode 7 discussion

The seventh episode of Kimetsu no Yaiba: Mugen Ressha-hen (Mugen Train Arc), titled serves as the emotional and narrative finale of the arc. This episode concludes the fierce battle between the Flame Hashira, Kyojuro Rengoku, and Upper Rank Three demon Akaza. Plot Overview & Narrative Climax