Demon Slayers vs Tanjiro Kamado

Prologue
As Muzan Kibutsuji lay dying, in a desperate effort to preserve himself, he transforms Tanjiro Kamado into a Demon and transfers all of his memories to the young Demon Slayer.

Muzan entrusted Tanjiro with wiping out the Demon Slayers and believed that Tanjiro would, like his sister, have a resistance to sunlight, which is normally fatal to Demons.

Upon becoming a Demon, Tanjiro recovers from the poison that caused a disgusting growth to form on his face, and he regrows his lost arm. As Muzan predicted, Tanjiro had resistance to sunlight.

Kanao uses the medicine to cure Tanjiro before getting hurt in the process. In Tanjiro's consciousness, Kibutsuji tries to convince him to give himself in to the desire of becoming the ultimate being. Then, several hands from the wisteria flowers reach out for him. Tanjiro goes to them and is brought back to reality with his humanity restored.