Muzan Kibutsuji

Intro  Muzan Kibutsuji,the demon king.Did the peace with the demon slayer corp. Hates and he's afraid of Yoriichi. Loves Kokushibo the uppermoon 1.Has a sister named Zankiya. Has a bestfriend named Sayaka. His past : people experienced into him,Zankiya and Sayaka.Sayaka looks like a child cuz of the curse of the experiences of her. (Your Kokushibo). (Fact for Kokushibo and Sayaka : they meet each other cuz she was destroying his village when he has 8 years old.She let him alive and ask for his name. He says his name Michikatsu Tsugikuni.