Sayaka Igarashi is a supporting character in Kakegurui. She's also secretary of the Student Council and Kirari Momobami's assistant.


Sayaka is a girl with an average height. She has dark violet long hair with bangs styled into long ponytail that is tied with white ribbon. She also have empty dark violet eyes. She wears the Hyakkaou Private Academy issued uniform; a red blazer with black trim lining the cuffs and collar, a white button up dress shirt, a dark pleated skirt which is slightly longer than skirts belongs to other girls, a tie and black colored socks. As well as the academy's issued footwear, brown colored loafers with black soles. She also sports light pink lipstick.


Sayaka is intelligent and serious girl, who deeply cares about school and Student Council. She's endlessly loyal to Student Council President, Kirari Momobami and is able to do anything for her. It seems that she has a crush on Kirari, as she expressed concern and sadness when she drove off without telling her where she went and what she was doing. While she seems to be a reserved and calm, her subduing of a violent student, Jun Kiwatari and telling him what he now owes in the debt recollection game shows that she's every bit as terrifying as the rest of the Student Council. She's also somewhat jealous of Yumeko Jabami, because she makes Kirari intrigued and seeing her as a plague.


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