Ryōta Suzui, a second-year student at Hyakkaou Private Academy, serves as class representative in the Flower Class. Standing 173 cm tall with an ordinary build, pale skin, neck-length messy brown hair, and brown eyes, he wears the academy's standard uniform: a red blazer with black trim and gold buttons, white button-up shirt, black tie, gray-black jeans, and brown loafers. Initially forced into "house pet" status (designated "Pochi" for male pets) after losing a poker game to Mary Saotome, Ryōta ranks in the school's bottom 100 hierarchy. This subjects him to demeaning treatment, including being used as a footstool and slave. His life shifts when assigned to guide transfer student Yumeko Jabami. During Mary and Yumeko’s "Voting Rock-Paper-Scissors" game, Ryōta is coerced into helping Mary cheat by signaling opponents' moves. After Yumeko wins despite his interference, she reveals her awareness of his role and gifts him 5 million yen to clear his debt, freeing him from pet status and becoming his first friend. Timid, kind, and level-headed, Ryōta lacks his peers’ aggressive gambling instincts but demonstrates sharp observational and analytical abilities. He quickly masters game rules and detects cheating methods, such as Itsuki Sumeragi’s "Double Concentration" and Yuriko Nishinotōin’s "Life or Death." His primary motivation is concern for others, particularly anxiety over Yumeko’s risk-taking. Exposure to her fearlessness gradually builds his confidence, leading to assertive acts like refusing manipulation by student council president Kirari Momobami during a gamble. Ryōta’s development includes deeper involvement in high-stakes gambles. As dealer in Midari Ikishima’s "ESP Game," he devises a strategy to covertly assist Yumeko by signaling card placements under life-threatening pressure. During the "Nim Zero Style" event, he voluntarily risks his life to protect others, showcasing selflessness contrasting peers who gamble for personal gain. His loyalty extends beyond Yumeko; he returns a 260 million yen check to the student council without hesitation and offers Yumeko financial aid during her house-pet phase, though she declines. His background lacks explicit detail, but contextual clues suggest he lacks extreme wealth—5 million yen was an insurmountable debt for him but trivial to classmates. Relationships define his role: a trusting bond with Yumeko, a complex dynamic with Mary (oscillating between resentment and reconciliation), and general respect from classmates for his consistent decency, earning him the academy’s "nice guy" label. Across all media, Ryōta functions as an audience surrogate, explaining game mechanics and serving as the narrative’s moral anchor.