from Kakegurui: Compulsive Gambler
Age
16
Origin
Japan
Ibara Obami is a member of The Hundred Devouring Families. He arrived to the Hyakkaou Private Academy to gamble against Kirari Momobami in order to dethrone her from student council president position and thus choosing a new leader of their clan. Though his branch is widely known for being swindlers, Ibara isn't a good one, being known as a punching bag in his family.

Kakegurui: Compulsive Gambler
Unlike many schools, attending Hyakkaou Private Academy prepares students for their time in the real world. Since many of the students are the children of the richest people in the world, the academy has its quirks that separate it from all the others. By day, it is a normal school, educating its pupils in history, languages, and the like. But at night, it turns into a gambling den, educating them in the art of dealing with money and manipulating people. Money is power; those who come out on top in the games stand at the top of the school. Yumeko Jabami, a seemingly naive and beautiful transfer student, is ready to try her hand at Hyakkaou's special curriculum. Unlike the rest, she doesn't play to win, but for the thrill of the gamble, and her borderline insane way of gambling might just bring too many new cards to the table.