Dosai

(He is my Kimetsu No Yaiba OC, and this takes place after the Entertainment District Arc.) He is a very formal speaker, and dislikes using his abilities. Said abilities can only have an effect on humans. He only consumes blood, and even then, only around 500 milliliters. He is biologicallly 18 years of age, but is chronologically 24 years of age. A demon who utterly loathes Muzan Kibutsuji, the progenitor to all demons, and wishes to destroy him. However, because he suffers from Kibutsuji's Curse, which means that he cannot reveal any information about Muzan, or even say his last name. If he were to do so, then his sclera will turn brown as three massive brown arms come out of his body, and rip him apart. As a demon, he does not recall anything from his previous life as a human. He wears a small bamboo muzzle with a black ribbon attached on either side, which is has been cut flat on the front with the word, "後悔" carved onto the front. He wears a black face mask over it, as you can see.