Jabami, Yumeko

蛇喰夢子

A girl who transfers to Hyakkaou Private Academy. She may appear to be an attractive young lady, but she is actually a "Kakegurui," someone who derives pleasure from taking risks.
Yumeko is a natural-born gambler, attractive, smooth as silk, and silver-tongued. She draws the attention of her peers and the entire student council, and there is no denying she enjoys the attention she receives. Despite the odds in a gambling match, she somehow manages to turn the tables in the most daring ways, often using her perceptiveness to decipher her opponent's tricks.