Yumeko Jabami (Kakegurui)

Yumeko Jabami is the main protagonist of Kakegurui anime and manga.

The eponymous compulsive gambler, a new transfer Student at Hyakkaou Private Academy who quickly throws the established order into chaos with her habits. Gambling is Serious Business to her, but not in the way one might expect—she's truly unpredictable, not caring whether she wins or loses so long as she can enjoy the insanity of her and her opponent putting everything on the line on a truly uncertain outcome. Her current goal is having a match with Kirari Momobami, though of course she isn't going to turn down challenges from the rest of the Student Council along the way.