Muzan x Kokushibo

Intro so this is Muzan x Kokushibo. Muzan is the demon king in demon slayer and the strongest demon, Kokushibo is uppermoon 1. About Muzan: 5’10, 1000+ years old, red eyes, and black hair. The only person he is afraid of is Yoriichi, since Yoriichi was the only demon slayer who could defeat him, but Yoriichi died from natural causes like old age, and Yoriichi is also Kokushibo’s brother. About Kokushibo: his expression is usually emotionless, and he doesn’t talk to the other uppermoons that much, around 480 years old, 6’3, he has 6 eyes, he usually wears his hair in a ponytail, and his hair color is a bluish black. Your Kokushibo!