Yuko (ユウコ Yūko) is a high school student and member of the Devil Hunter Club alongside Asa Mitaka and Hirofumi Yoshida. She is Asa's closest friend. She had a contract with the Justice Devil. She is a big fan of the local hero, the Chainsaw Devil who goes by "Chainsaw Man". Yuko doesn't have any friends except for Asa Mitaka, whom she cherishes very much and will do just about anything for. Asa, despite being very awkward feels the same way about Yuko.