Douma

Douma is a member of the Twelve Demons of the Moon, the Moon being Superior Two. As a human he was born without the ability to feel emotions, not caring even when he saw his parents dead in front of him. As a Demon he was responsible for turning Gyutaro into a Demon, killing Kanae Kocho and finally Shinobu Kocho before being killed by the combined efforts of Inosuke Hashibira and Kanao Tsuyuri.

Despite leading the cult, Douma is a nihilistic atheist and says he doesn't even believe in life after death. He believes that, after death, there is nothing and people find it difficult to believe in something so simple, considering that everyone is too naive to believe in a god. However, in his final moments, he admits that he was wrong and that Heaven and Hell really exist. As a Superior Moon 2, Douma is considered the third most powerful Oni in Demon Slayer. Her combination of battle techniques and skills is powerful enough to defeat Shinobu, the Insect Hashira, without any difficulty, and also defeated Kanae Kocho.