Yumeko Jabami (蛇喰 夢子) is the main protagonist of Kakegurui - Compulsive Gambler. She's a second-year transfer student at Hyakkaou Private Academy and the classmate of Ryota Suzui and Mary Saotome. Yumeko is a member of the family of Kirari Momobami that challenges her for Hyakkaou Private Academy.