Kyogai, Kimetsu no Yaiba Wiki

Kyogai (響 (きょう) 凱 (がい) , Kyōgai?), also known as the Drum Demon (鼓 (つづみ) 鬼 (おに) , Tsuzumi Oni?) was the primary antagonist in the Tsuzumi Mansion Arc of Demon Slayer: Kimetsu no Yaiba. He was a demon formerly affiliated with the Twelve Kizuki, having previously held the position of Lower Rank Six (下 (か) 弦 (げん) の陸 (ろく) , Kagen no Roku?) before Muzan Kibutsuji excommunicated him for not being strong enough. Kyogai was a very tall, muscular, humanoid demon, possessing grayish skin, black hair, razo

How did someone as weak as Kyogai get into the 12 Kizuki? - Quora

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