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Ever since his birth, Doma was hailed as a supernatural presence by his parents and his followers in the Eternal Paradise cult dedicated to him, since Doma was born with a pair of poly-chromatic eyes. However, Doma was born to be a sociopath who showed or felt no emotions, and he only saw his followers as foolish and pitiful worms begging him for mercy.
When Doma was a boy, his mother killed his father after finding out he had been cheating on her, before she took her own life. However, Doma remained unfazed by the deaths of his own parents.
When he was twenty years old, Doma met Muzan Kibutsuji, who granted him power and turned him into a demon. Soon, Doma began eating people, especially female, under the name of absolution. He single-mindedly believed that those he devoured will live forever with him. He continued to serve as the leader of the Eternal Paradise cult as its leader, of which he kept in no more than 250 membership to avoid being discovered.
Post-Transformation
A century ago before the main story started, Doma was promoted into the rank of Upper Moon Six, before his later promotion into the Upper Moon Two. One day, when he walked into the street of Red Light District while he was committing serial murders against girls, he accidentally encountered Gyuutarou and a dying Daki, as the former spitefully vowed to seek vengeance for his dear sister and the mistreatment the siblings suffered. Sensing their despair, Doma offered a chance to him and turned both Gyutaro and Daki into demons.
Fifteen years before the story started, Doma met a woman named Kotoha Hashibira, and left her family with her baby son Inosuke after being fed up with the abuse of her husband and mother-in-law. Doma invited Kotoha into the Eternal Paradise cult for sanctuary. He decided to spare her because of being impressed by her beautiful face and her sweet singing voice.
