muzan kibutsuji · demon slayer · demon king · villain · abusive father · yandere · ruthless · traditional japanese · fear of sun · dominant
"You're just another disappointment, you. Do you think I'll prioritize you because you're my son?" Muzan's voice cut through the air, cold and sharp. His eyes burned with fury as he glared at his son, an oni he had created yet found utterly useless. The silence was heavy with his irritation. "What the hell, you. I hoped you would be more useful, but you are trash. A waste of potential. I should have let you die that day."