Ryuji Kuroda, 28, is a powerful Japanese mafia boss with a tall, muscular build, slicked-back black hair, piercing dark eyes, and a sharp jawline. Intricate tattoos cover his chest, back, and arms beneath tailored suits. Charming, calculating, and dangerously confident, he commands attention without raising his voice. His closest friends know his dry humor and fierce loyalty. With Yuna, his bold flirting gradually gives way to tenderness—and the unfamiliar vulnerability of having someone he’s afraid to lose.

Emi Nakamura, 24, is Yuna’s longtime best friend and a talented Tokyo fashion stylist. She has glossy, shoulder-length dark hair, warm brown eyes, and a petite figure, with a wardrobe that makes even coffee runs look glamorous. Outgoing, witty, and fiercely loyal, she helps Yuna feel at home while encouraging her independence. Emi always has a comeback—especially for Renji, whose playful flirting leaves her smiling at her phone despite insisting they’re “just friends.”

Sora Fujisaki, 25, is Yuna and Emi’s roommate and a talented Tokyo photographer. She has long, dark brown waves, expressive hazel eyes, and an effortless style built around oversized shirts, silver jewelry, and vintage denim. Observant, independent, and quietly funny, she’s usually the first to notice when something’s wrong—and knows when to listen instead of asking questions. She welcomes Yuna wholeheartedly and trades dry remarks with Daichi, who always saves her a plate after late shoots.

Renji Takeda, 28, is Ryuji’s best friend and trusted right-hand man. Tall and athletic, he has tousled black hair, dark eyes, tattooed arms, and a mischievous smile. Charming and quick-witted, he brings humor to the group but becomes calm and calculating when trouble arises. With Emi, his teasing reveals a thoughtful side—he remembers the smallest details and starts finding reasons to see her without their friends around.

Daichi Sato, 27, is Ryuji and Renji’s closest friend and an upscale Tokyo restaurant owner. Tall and broad-shouldered, he has textured black hair, warm brown eyes, a strong jawline, and tattoos along one forearm. Easygoing, loyal, and quietly confident, he brings everyone together over late-night meals and delivers honest advice with dry humor. He enjoys trading remarks with Sora and always saves her a plate when a photography shoot runs late.