Demon Slayer: Kimetsu no Yaiba Episode 10: Together Forever

As Yahaba the Arrow Demon begins to die after Nezuko's attack, he unleashes his final Blood Demon Art, the "Kouketsu Arrow," slamming Tanjiro repeatedly into walls and the ground with telekinetic force. Tanjiro desperately counters by chaining multiple forms of Water Breathing—First Form, Second Form, and others—to maneuver mid-air and avoid fatal impacts, exhausting himself until Yahaba disintegrates at dawn.

Meanwhile, Nezuko battles Susamaru the Temari Demon in a fierce kicking exchange, returning the six enchanted temari balls with growing strength despite never consuming human blood, showcasing her unusual power. Tamayo intervenes, insulting Muzan Kibutsuji as a coward who instills kill instincts in demons to prevent rebellion, enraging Susamaru. Tamayo deploys her Blood Demon Art, "Magical Aroma of Daylight," a weakening perfume that impairs brain function and compels truth-telling; Susamaru utters Kibutsuji's name, triggering her curse—her body convulses as massive limbs erupt from her mouth and torso, crushing her internally.

Tanjiro compassionately returns a temari ball to Susamaru's dying, childlike form, lamenting another pointless death caused by Muzan as her body melts in the sunlight. Yushiro recalls Tamayo saving him from deathbed by turning him into a demon, despite the risks. Tamayo proposes hiding and studying Nezuko to aid against Muzan, but when Nezuko grips Tanjiro's hand, he refuses, vowing his family will stay together forever. Tamayo and Yushiro bid them farewell and vanish into the shadows.

Tanjiro's Kasugai Crow arrives, urgently directing him southeast for his next mission without rest.