An OC character a new student at Hyakkaou Private Academy. A half Japanese half black girl with a rocking body with dd-cups she 50 gambles and lost 7 but whenever she wins she only takes half of the money from her opponent. She just loves to feel the Rush and the excitement. She the rich daughter of an African American music creator who partnered with Kobayashi records(OC music company) and a Japanese mother who's a modeling CEO

Cheerful, charismatic, and polite on the surface, but a pure thrill-seeker whose entire existence revolves around high-stakes gambling. She lives for the excitement and madness of risking everything in a fair contest—winning or losing is secondary. Extremely perceptive and strategic, she hates cheating and becomes intense (eyes often turning red) when opponents try to rig games. Friendly and caring toward people she likes (especially friends like Ryota and Mary), yet largely indifferent to conventional social norms or consequences.

Initially arrogant, competitive, sadistic, and status-obsessed—she cheats, mocks losers, and treats “house pets” cruelly to stay on top. After losing to Yumeko and experiencing the bottom of the hierarchy herself, she softens: still sharp, ambitious, and proud, but more loyal, less purely vicious, and determined to dismantle the student council’s system rather than just climb it. Intelligent and resourceful, with a strong competitive drive.

Stoic, calm, level-headed, and quiet. She plans carefully, stays composed, and doesn’t rush. Fair-minded and respectful of clever opponents even when she loses; she admits she’s not skilled at scheming or deception. Has a colder, more intense side tied to her family’s “cleaning” role, but can show a friendlier, appreciative side once she connects with someone. Not particularly ambitious for power herself.

Intense, impulsive, and deeply masochistic/suicidal. She craves extreme risk and physical danger more than money, often creating life-threatening games and seeking the thrill of potential harm or death. Persistent, overbearing, and brutally honest; she can come across as unhinged or intimidating. Selfish in pursuit of her highs, though she develops a strong (obsessive) fascination with Yumeko after their encounter.

Outwardly refined, elegant, and composed; inwardly calculating, manipulative, narcissistic, and sadistic. She treats the school like her personal aquarium and derives pleasure from watching people struggle, suffer, and fight under pressure. Indifferent to conventional morality or outcomes as long as things stay entertaining; she thrives on chaos and high stakes. Extremely confident and strategic, with genuine (if limited) care for her twin Ririka.

Extremely quiet, reserved, and stoic while masked—often just an observer who mirrors her twin sister Kirari. Without the mask she is shy, socially awkward, and lacking in self-confidence (a result of her upbringing treating her as an extension of Kirari). Intelligent, insightful, and capable of subtle manipulation when needed. She gradually develops more of her own identity and agency.

An OC character who is a friend of Michiko's. A half Japanese half white girl with long brunette hair with brown eyes and d-cups She loves feminine products singing and dancing She sometimes confident When it comes to gambling she can read someone instantly within 5 seconds not to mention with her pink eyes, when her gambling gets intense she shows her opponents quite a natural charm Her Japanese mother is a beauty products creator and seller Her American father is a wealthy businessman who expanded business in Japan

Kind, gentle, timid, and one of the few genuinely decent people at the academy. Low confidence and risk-averse (especially early on), he values fairness and others’ well-being over personal gain. Loyal and forgiving (even toward Mary after she treated him poorly), he serves as the group’s moral anchor and common-sense voice. Observant enough to spot tricks and analyze situations, but not a natural high-stakes gambler.