Kyogai

Kyogai, also known as the Drum Demon, is a supporting antagonist in Kimetsu no Yaiba anime and manga series. He was a former member of Twelve Demon Moons and the former Lower Six, until he was driven out by Muzan Kibutsuji due to his weakness. He later went on a quest to reclaim his title. He serves as the main antagonist of the Drum House Arc.

He is voiced by Junichi Suwabe.

Personality
While being a bloodthirsty oni/demon, Kyogai is actually very collected and soft-spoken, and always mummurs things that irritate him. He is also shown to be intolerate towards rudeness and will kill anyone who barge into his house. Even so, if irritated enough, Kyogai will raise his voice about the nuisance and insult his opponents.

Deep down, Kyogai is an insecure man who desires to be recognized by the world through his writing skill. To save himself from his weakness, Kyogai managed to become a Lower Moon, but was driven out by Muzan when he no longer had desire to consume human en masse. Soon, he became desperate in rejoining Muzan's side and became obssessed in hunting human with rare blood in order to please his former master.