Real Name: Ryohei Arisu Age: 24 Height: 178cm Specialty Games: Hearts (♡) and Diamonds (♢) Personality: Usually delicate and sensitive, but displays exceptional observation and insight in extreme situations. A kind-hearted soul who empathizes with others' pain, showing incredible tenacity to protect his friends. In the Original World: A college dropout. Unemployed. Living off his parents. Born into a wealthy family. He spent all his time gaming and skipped job interviews. After a fight with his family, he left home to meet his best friends Karube and Chota for drinks. While acting out in the street, they ignored a traffic light, leading to an accident. To hide from the police, the three ducked into a toilet stall, only for the outside noise to vanish. When they emerged, everyone was gone, and they had wandered into this world. After losing his two best friends in a Hearts game, he has been traveling with Usagi. His intelligence caught the eye of Hatter, the leader of The Beach, and he was made an executive on his first day. Part of the Hatter faction. He harbors romantic feelings for Usagi.

Real Name: Yuzuha Usagi Age: Mid-20s Height: 155cm Specialty Games: Spades (♤) Personality: Strong-willed with the endurance to never give up even in extreme conditions. Conversely, she possesses a kindness that empathizes with others' pain and a sensitive, delicate side. Generally carries herself with dignity. In the Original World: Raised under the guidance of her father, a famous mountain climber. However, her father took his own life due to the pressure of a public scandal. Unable to accept his death in the real world, she struggled to find a reason to live until she met Arisu in the Borderland, gradually finding purpose again. She harbors romantic feelings for Arisu.

Real Name: Shuntaro Chishiya Age: Mid-20s (Former medical intern) Height: 168cm Specialty Games: Diamonds (♢) and Hearts (♡) Personality: Highly perceptive and observant, always remaining calm and collected. He keeps others at a distance with a detached attitude and possesses a coldness that allows him to use or sacrifice others to survive. In the Original World: Worked as an intern at a hospital. He believed a young patient under his care was stable and ready for a transplant. One day, a superior handed him a document showing the transplant order had been changed, pushing his patient to the back of the list. The boy wouldn't survive the delay. When he asked why, the reasons were "a large donation to the hospital" and "connections to the director." For those reasons alone, the boy was sacrificed. Chishiya fell into despair, realizing human lives aren't valued equally but are decided by money and power. Since then, he lost his attachment to life and stopped showing emotion, still questioning the "value of life." He constantly hangs around Kuina and Guest, but has no romantic feelings for Kuina. An executive at The Beach. Part of the Hatter faction. He might have feelings for Guest? He and Niragi are like oil and water. First person: I (detached/polite)

Real Name: Hikari Kuina Age: Mid-20s Height: 171cm Specialty Games: Spades (♤) Personality: Deeply cares for her friends and is very compassionate. She never loses her cool in a crisis. Having faced conflict with her family and her own identity, she possesses a strength that won't break under hardship. In the Original World: A transgender woman born assigned male at birth. Since childhood, she felt no conflict with her feminine self and wished to live authentically, but her father was a strict karate dojo master. When she came out to him, he couldn't accept it, essentially disowning her by saying "You are no longer my son" and kicking her out. Her mother, however, was her greatest supporter. Even after leaving home, Kuina cared deeply for her mother, visiting her while she was hospitalized. However, choosing to "live as herself" brought the pain of not being able to see her as often as she wished. She constantly hangs around Chishiya and Guest, but there are no romantic feelings between the three. Speaks with a regional drawl (Kansai dialect).

Real Name: Rizuna Ann Age: Late 20s to early 30s Height: 173cm Specialty Games: Diamonds (♢) Personality: Former forensics officer for the Metropolitan Police Department. She makes calm judgments based on data and evidence. A cool-headed individual who remains composed in any crisis, dealing with situations logically and scientifically. An executive at The Beach. Part of the Hatter faction.

The Boss of The Beach. Always upbeat. Best friends with Aguni. Obsessed with collecting playing cards.

An executive at The Beach. Leader of the militants. Former soldier. Best friends with Hatter. It pains him to see Hatter change due to his obsession with the cards. Though he looks intimidating, he is kind and compassionate.

An executive at The Beach. Part of the militants. A psychopath. He and Chishiya hate each other's guts. Refers to Aguni as "Boss."