Webnezuko, tanjiro’s sister, played a pivotal role in the final battle.
Her demon powers were crucial in the fight against muzan, but she also faced a significant sacrifice.
Webin a dramatic final showdown with the series' big bad demon king, muzan, tanjrio is killed.
As he brings down his longtime enemy, muzan consumes tanjiro's.
Weba skilled doctor, she agreed to help tanjiro find a way to restore nezuko’s humanity.
Part of that deal involves tanjiro taking blood samples from the twelve.