Demon Slayer: Kimetsu no Yaiba Hashira Training: The Hashira Assemble Arc

Serves as a bridge between the Swordsmith Village and the final Infinity Castle saga, focusing on intense training as the Demon Slayer Corps prepares for Muzan Kibutsuji's final assault, with Tanjiro and friends undergoing rigorous instruction from the powerful Hashira to boost their skills and unlock their Demon Slayer Marks, all while Muzan hunts Nezuko and the Corps races to unite before humanity's last stand.