Transformation

The fourteenth episode of season two, adapting chapters 83 through 86, follows Nezuko as her body grows, gains vine-like markings, and sprouts a horn while her regeneration outpaces Daki's. She burns the Upper Rank with an exploding-blood technique, but the scent of an injured girl drives her toward humans. Tanjiro muzzles her with his scabbard and finally calms her by singing their mother's lullaby. Tengen severs Daki's head, yet she will not disintegrate, and her brother Gyutaro emerges to take the fight.

Nezuko unleashed

Healing instantly, Nezuko pins and kicks Daki through several buildings before her bloodlust nearly claims a wounded bystander. Tanjiro restrains and pleads with her, and a vision of their mother helps her shrink back to her usual form and sleep.

Gyutaro appears

Tengen reveals he beheaded Daki earlier, but she keeps clutching her head and tantrums rather than dying. A new demon grows from her neck stump, heals her burns, and names himself Gyutaro. He hurls poisoned kamas and uses Flying Blood Sickles against Tengen, who deploys bombs and realizes the siblings are an exceptionally dangerous pair.

The episode takes its title from chapter 83. The first eyecatcher reworks a volume 10 extra sketch, the second the cover of chapter 84. Several beats are expanded beyond the manga, including Nezuko stomping off Daki's arms, the chase through the district streets, and Tengen entering the house to block an attack. In the source manga, Daki calls her brother by name from the start; the anime has her cry out only for her brother until Gyutaro names himself.