Kirari Momobami

Kirari Momobami is the main antagonist of Kakegurui, particularly serving as the main enemy in its first arc as well as the first season of its anime adapation. She is the 105th student council president at Hyakkaou Private Academy. She is also the one responsible for the current hierarchy at the academy, making her the archenemy of Yumeko Jabami.

Portrayl

 * In the anime, she is voiced by Miyuki Sawashiro in Japanese version, and by Michelle Ruff in English version, with the latter also voiced Euphemia li Britannia and a young Lelouch vi Britannia in Code Geass. Both of them also voiced the Ririka Momobami.
 * In the live-action drama version, she is portrayed by Elaiza Ikeda, but she only made her full appearance in the upcoming movie sequel of the drama. Her face is obscured in the first season of the drama.

Personality
With a facade of a refined and proper lady, Kirari is in truth a calculating, twisted, self-centered, manipulative and psychopathic sadist at the core. Kirari is complete narcissist who belittles everyone besides her, believing everyone is to play by her terms alone. Her gambling skills are so outlandish and her own personality is so imposing that nobody dares to go after her, specially head on. Even those who do find themselves regretting dearly. Everyone even treats Yumeko's idea of playing against her as complete madness.

Being the creator of the academy's infamous pet system, Kirari purportedly encourages mistreatment, bullying and sub-human conditions on other students, being responsible for the entire series' bad events that Yumiko decided to topple. During the progress, she reveals a sadistic side to her as well.

Kirari imposes life plans or other tormenting punishment upon losers with little regard for anything other than hersel. In the meantime, she seems to relish on imposing fear on others and make their lives as miserable as possible. She attempts to gain anything from it, from mere amusement to financial or political benefit. She sees the academy her aquarium and enjoys observing how people act, when they are at their lowest and have to fight for the top.