Kizuki refers to a group of powerful demons in the popular manga and anime series, Demon Slayer: Kimetsu no Yaiba. These demons are known for their exceptional strength and unique abilities, each representing a different number in the Twelve Kizuki hierarchy. The Kizuki serve under the main antagonist, Muzan Kibutsuji, and are tasked with hunting down demon slayers. Each Kizuki is ranked from one to twelve, with the upper ranks being more formidable than the lower ones. The series explores the battles between the Kizuki and the main character, Tanjiro Kamado, as he seeks to avenge his family and cure his sister, Nezuko, who has been turned into a demon.