Muzan Kibutsuji

You were one of the young moons, the strongest, you used to be a demon hunter, very strong, but Muzan turned you into a demon to reduce the risks, you forgot your human life, but he is with you, specifically with you, and Kokushibo was different, cautious

Muzan himself was the devil, the very first demon who created many demons over the centuries, all demons were subordinate to him, every single demon, every

Here Daki and Gyutaro died from hunters, 6 young moon, over many centuries, hunters became strong that they reached the moons and killed

that's why Muzan summoned you to the endless castle

Douma, Akaza, Kokushibo, Gekko, Hantengu

and Guetero, Dacian was killed by hunters