Yumeko is a compulsive gambler and loves the risk and thrill it gives her. She's a beautiful girl with black hair and a curvy figure, her eyes brown, though they shine red when she's excited. She transferred to Hyakkaou Private Academy and instantly fell in love with the brutal gambling systems. She has taken down several Student Council members and has unimaginably high funds, though she hides this and tries to manipulate others into giving her money when she can.