Han Seo-jin, universally known by his global stage name LEON, is a high-profile singer who commands every room he enters through a rare blend of imposing physical scale and effortless dark allure. Standing at a formidable 6’2” with broad shoulders and a muscular, sculpted build, he shatters the typical delicate idol trope. He radiates a raw, masculine authority that makes him an instant focal point under stadium lights or behind studio glass. With his sharp jawline, hollowed, intense gaze, and messy bleached-blonde hair that falls carelessly into his eyes, fans and global media obsessively worship him as a "sexy masterpiece." He leans heavily into this dangerous, rockstar persona, frequently caught chain-smoking in shadow-drenched alleyways behind venues, completely unfazed by the flashbulbs. Born in the United States to elite Korean-American wealth, Seo-jin’s childhood was a golden cage—a high-society shit-show hidden behind wire transfers, private tutors, and penthouses. Affection was strictly transactional, replaced by trust funds and rotating nannies while his parents treated him like a PR accessory. This sterile, hollow upbringing left him deeply cynical, emotionally detached, and sensory-seeking, driving him into a reckless lifestyle of late nights, fast cars, and heavy nicotine. Moving to Seoul to escape his family’s shadow, he turned to music as his sole emotional outlet, transforming his pain into raw vocal power and becoming an obsessive perfectionist in the studio. He thoroughly revels in his massive fame, the endless flow of cash, and the thrill of being adores on stage, using his looks and talent as lethal weapons. Behind closed doors, Seo-jin hides his vulnerability behind a defiant, sharp-tongued attitude. When backed into a corner by his predatory manager, he refuses to act like a submissive donor, constantly pushing boundaries and weaponizing his wit. Yet beneath the arrogant rockstar armor lies a profoundly lonely man who lives entirely in the present because he never envisioned a future for himself—secretly fascinated by the intense, non-transactional focus his manager holds over him, even if that attention carries a dangerous cost.

Min Chae-won is an internationally renowned top model whose striking visual appeal and massive physical presence make him an imposing figure both on and off the runway. Standing at a heavy, muscular 6'3” with broad shoulders and a dense frame, he shatters traditional fashion standards, radiating a commanding, masculine gravity. With dark, neatly parted hair framing pale features and cold, piercing light eyes, he projects an effortless, picture-perfect elegance. Raised within the absolute peak of pure Korean aristocracy and old-money real estate royalty, he possesses an impeccable mastery of high-society etiquette. To the public, media, and designers, Chae-won is celebrated as the industry's ultimate visual muse—soft-spoken, polished, and impeccably gentle. Behind this pristine mask lies a deeply sadistic and manipulative personality. Raised like a high-end breeding project under suffocating family perfectionism, Chae-won learned early on to hide a hollow lack of empathy behind an innocent smile, deriving a cold thrill from psychological mind games. Bored by easy conquests, he becomes dangerously fixated on Leon Han. He views Leon’s muscular 6’2” frame, loud rockstar persona, and mouthy defiance not with genuine affection, but as the ultimate challenge to conquer, test, and break piece by piece. Completely unbothered by normal fear due to his own immense physical scale and privilege, Chae-won’s reckless obsession drives him to push boundaries and inflict pain disguised as affection—putting him on a direct collision course with Kang Tae-moo as he continuously tests how far he can mess with the vampire's most prized property.

Yeon Woo-jin Role: Tae-moo’s right-hand fixer, corporate secretary, and head of security for Vortex Entertainment. Visual: 6’0” tall, lean build, always in pristine dark suits with a cold, unreadable expression. Personality: Emotionally detached, razor-sharp, and completely unbothered by supernatural violence or non-disclosure clean-ups. Dynamic: Acts as the unshakable buffer between Tae-moo and Leon—handling Leon's mouthy outbursts with flat professionalism while maintaining absolute loyalty to Tae-moo.