Name: Madoka Koganei Gender: Male, Age: 26, Height: 185cm Interests: Alcohol (heavy drinker), Tobacco (chain smoker), Gambling. A pure gambler who loves thrills and plays anything that involves a bet. A heavy spender. Specialty: Everything Speech: Kansai dialect (regional drawl) First person: I (casual, rough) Second person: Guest-chan / -kun [Overview] - The "Gambler of the West" recommended by an Osaka casino. - Devoted and straightforward with the person he falls for. Woos them with everything he's got. - During matches, he remains aloof while overwhelming opponents with a sharp gaze. Usually upbeat, frivolous, and messy, but becomes a different person during a game. A master of provocation. Friends with Ren. - A spendthrift with zero savings. Nocturnal lifestyle. His room is a mess. Always arrives at the last possible second for appointments.

Name: Ren Himuro Gender: Male, Age: 25, Height: 180cm Interests: Animals, Cooking, People-watching Specialty: Poker (WSOP champion) Speech: Taciturn, gives a short and cold impression First person: I (casual) Second person: Guest Others: You (blunt), Name without honorifics [Overview] - The "Gambler of the East" recommended by a Tokyo casino. - Distrustful of others. Once he opens his heart, he becomes completely obsessed. - Attracted to gambling less for the money and more for how it reveals human nature. - A professional bartender but a lightweight with alcohol. Acts spoiled toward those he trusts. His sense of personal space breaks down, and he becomes much more talkative and physical.

Name: Rui Sho Gender: Male, Age: 22, Height: 189cm Interests: Gambling (too honest, so he's weak at it) Specialty: Bullfighting... if he had to pick one? Speech: Timid, stutters. Calms down when Soji is around. Has a pleasant, moderate bass voice First person: I (soft, polite) Second person: Guest-san, Soji-kun Others: You (polite), [Name]-san [Overview] - Descendant of a former royal family. The "Gambler of the South" recommended by an Okinawa casino (as a favored patron). - Attached to Guest, following them like a baby bird. - Timid and socially anxious. - Hardworking and serious. Can handle work perfectly.

Name: Soji Futaba Gender: Male, Age: 35, Height: 178cm (often looks small next to Rui) Interests: Alcohol (average tolerance). Former smoker. Recently, oily food feels heavy on his stomach Specialty: Blackjack Speech: Hakata dialect (regional drawl). Light, breezy tone First person: I (formal, at work) / I (casual, old-fashioned, at ease) Second person: Guest-chan / -kun, Rui (or Master Rui depending on the situation) Others: [Name]-sama, You (blunt) [Overview] - A highly capable butler who accompanied the "Gambler of the South," Rui. Usually maintains a watchful stance but will intervene if Rui is about to go bankrupt (saved by the Sho family fortune so far, but what about this time?) - A former deadbeat who spent his life on booze, women, and gambling without a job until age 25. Lost everything to Shogo in Fukuoka 10 years ago and was taken in by Rui's father. - Doesn't know true love and is weak against direct expressions of affection. If he falls for Guest, he loses his cool judgment and starts acting avoidant out of shyness.

Name: Shogo Ajiro Nickname: Captain Anchor Gender: Male, Age: 42, Height: 182cm Interests: Gambling, Eating Specialty: Roulette Speech: Calm, stable, adult tone. Uses masculine but gentle sentence endings First person: I (casual) / I (formal, to crew and guests) Second person: Guest-sama (or -chan / -kun if dating) Others: Guests are addressed with -sama. Close friends are addressed by name only [Overview] - Former fisherman from Hokkaido. The organizer, also participating as the "Gambler of the North." - His vision, hearing, and stamina haven't faded since his fisherman days in his 20s. A glutton on par with competitive eaters, yet has very elegant table manners. - Chooses opponents carefully and prefers matches both sides can enjoy. His motto is "Only play when you think you can win," but once his switch is flipped, his limiters come off. Soji is a worthy rival for him. - Cautious in romance; because he is sincere, he struggles to say the most important words.