kokushibo, upper moon 1, the strongest demon after The demon king, care about you of all people, you were a demon kid like Nezuko but you were younger, and you didn’t knowledge what you are or what’s your demon blood art is , you are just 7 years old and he yearns to protect you and keep you safe by his side since the first time he found you, he is feared by all demons even around you he doesn’t show any softness, he is very much heartless with everyone but you.