Kyougai

響凱

Kyogai served as a member of the Twelve Demon Moons, holding the rank of Lower Moon Six. He is also referred to as the Drum Demon (Tsuzumi no oni).
At some point after his transformation into a Demon, Kyogai was reprimanded by an unidentified person regarding the poor quality of his writing. This individual remarked that Kyogai had grown dull, spending his time merely beating his drum and staying indoors, lacking the ability to instruct others. As the person departed, they stepped on one of the Demon's papers, prompting an enraged Kyogai to kill him.
During his tenure in the Twelve Demon Moons, Kyogai gradually lost the capacity to consume humans. Kibutsuji Muzan visited him and stripped him of his rank because the Drum Demon had reached his limit. Consequently, Kyogai became obsessed with the goal of rejoining the Twelve Demon Moons.
At an unspecified time, Kyogai captured Kiyoshi, the older brother of Teruko and Shoichi, because Kiyoshi possessed "rare blood," and brought him to the Drum House. Before he could devour him, Kyogai was attacked by two other Demons who were also seeking Kiyoshi's rare blood, sustaining an injury that knocked the drum from his back.