Юшіро

Yushiro is a traveling companion of Tamayo and close ally of Kamado Tanjirou. He was turned into a Demon by Tamayo. Yushiro was a human who was under the care of Tamayo as she was practicing as a medical practitioner. He was in the frail state fighting disease when Tamayo gave him the choice of succumbing to his illness or to live longer as a Demon. He agreed to become a Demon and has since stayed by Tamayo's side serving as an assistant as well as her guard. Yushiro would become the last known survivor of the Demon race.

In time he would dedicate himself to a life of art and become a world famous painter in the present day under the name of Yushiro Yamamoto, known for his paintings of Tamayo to wide critical acclaim