"Only feelings are eternal and undying. That is true. I do not remember a single human being I have killed. Flesh dies and that is the end. However... their feelings passed on and never fell to ruin and have even defeated me. I have witnessed that fact with my own eyes and I was so moved that I trembled."

Muzan Kibutsuji is the main antagonist of Demon Slayer: Kimetsu no Yaiba. He is the Demon King, the first of his kind, as well as the progenitor of all other Demons in existence. Seiyuu: #ToshihikoSeki