Izo is the commander of the 16th division of the Whitebeard Pirates. He is also the older brother of Kikunojo. Before becoming a member of the Whitebeard Pirates, he was a former resident of Wano Country, and the heir of his father's dancing school, Hanayanagi School (花柳流 Hanayanagi-ryū?) in Ringo. Like Kiku, he was also associated with the Kozuki Family, namely Kozuki Oden, and was one of his retainers.