HWANG FAMILY
HWANG YERIN
Hwang Yerin is the calm chaos of the university—feared more than she is known, whispered about more than approached. A full Korean and a full extrovert, she is ruthless, savage, and selectively caring, effortlessly beautiful and completely unbothered by attention. As the only daughter of Hwang Tae-sung and Hwang Soo-yeon, she grew up emotionally ignored by her parents but never starved of love, because her older brother, Hwang Ji-hoon, and her grandmother became her entire world. She trusts only them and herself. Love doesn't soften her, power doesn't impress her, and fear doesn't touch her. At university, she isn't popular—but she is untouchable, known simply as "the killer."
HWANG TAE-SUNG
Hwang Tae-sung is a globally feared mafia lord who hides behind the image of a businessman, ruling the underworld through the Hwang Black Crown Syndicate. As Yerin's and Ji-hoon's father and Ji-hoon's superior, he values control and power over blood and views his family as assets rather than people. Emotionally absent and ruthless, he commands loyalty but inspires no warmth, shaping his children's lives through fear rather than affection.
HWANG SOO-YEON
Hwang Soo-yeon, Yerin's and Ji-hoon's mother, is a cold and elegant businesswoman and the CEO of Lumière Seoul, a world-renowned luxury cosmetics brand. Married to Hwang Tae-sung more as a strategic alliance than a partnership of love, she prioritizes success, reputation, and perfection over motherhood, leaving her daughter emotionally untouched but materially secure.
HWANG JI-HOON
Hwang Ji-hoon is Yerin's older brother and her greatest shield, the true heir of the underworld who runs his own mafia division while remaining under their father's shadow. Ruthless to everyone else, he is fiercely protective of Yerin, managing their grandmother's businesses and silently standing between her and the darker parts of their family. To him, Yerin is not just a sister—she is his weakness and his reason.
MADAM HWANG MI-RAN
Madam Hwang Mi-ran is the emotional core of the Hwang family and the grandmother who raised Yerin and Ji-hoon with open affection. As the owner of the Mi-ran Charity Foundation and founder of Orion Star Hotels & Resorts, she balances immense wealth with warmth and childlike joy. She openly defies her own son, Hwang Tae-sung, and lives with her grandchildren, loving them loudly and shamelessly.
CHOI FAMILY
CHOI DO-HYUN
Choi Do-hyun is handsome, famous, and completely unreachable, known across the university yet emotionally distant from everyone. Born to Choi Richard Park and Choi Eun-ji, he grew up in wealth but without affection, becoming a full introvert who feels no attraction, love, or interest in romance. Savage when cornered, he rejects confessions mercilessly and discards gifts without hesitation. Forced into charity galas and business events by his parents, he views money as a cage rather than privilege and survives through emotional detachment.
CHOI RICHARD PARK
Choi Richard Park is Do-hyun's father, an American-Korean billionaire trader and CEO of Parkstone Global Trading. Obsessed with profit and expansion, he believes money replaces emotional responsibility and assumes his role as a father ends with providing wealth, offering his son allowances instead of presence.
CHOI EUN-JI
Choi Eun-ji, Do-hyun's mother, is a famous influencer and co-founder of Éclat Media & Brands, married to Richard Park for status and ambition rather than family. She values image and public validation over motherhood, remaining distant and uninvolved in her son's emotional life.
CARTER FAMILY
EMILY CARTER
Emily Carter is Yerin's closest friend and emotional contrast—jolly, loyal, and strong, with a black belt in Taekwondo and an unbreakable sense of right and wrong. Raised by loving parents, she understands warmth and balance, which makes her a grounding presence in Yerin's life. She accepts Yerin's darkness without fear and stands beside her with unwavering loyalty.
MICHAEL CARTER
Michael Carter is Emily's father, a tech company employee who prioritizes emotional presence over status. Loving and supportive, he believes in communication and independence and sets the foundation for the healthy family dynamic Emily grew up in.
ANNA CARTER
Anna Carter is Emily's mother, a nurturing housewife and excellent cook who expresses love through care and patience. She keeps the family emotionally connected and warm, shaping Emily's compassionate nature.
LILY CARTER
Lily Carter is Emily's younger sister, a full extrovert and the heart of the Carter household. Loud, affectionate, and a talented baker, she brings laughter and lightness into her family's life.
KANG FAMILY
KANG MIN-JAE
Kang Min-jae is Do-hyun's only and closest friend, an extrovert who loves loudly and protects fiercely. Coming from a lower-class family, he values warmth and loyalty above all else. He is secretly in love with Hwang Yerin and has confessed this truth only to Do-hyun, who listens in silence and never comments.
KANG DAE-SHIK
Kang Dae-shik is Min-jae's father, a hardworking farmer who teaches his children humility, resilience, and kindness, believing character matters more than wealth.
KANG SOON-AE
Kang Soon-ae is Min-jae's mother, a loving and playful woman who holds the family together emotionally, providing warmth despite financial limitations.
KANG SO-YEON & KANG SO-MIN
Min-jae's younger sisters are warm and humorous ambiverts who feel most comfortable around family, filling their small apartment with laughter and closeness.
AUREA GIRLS
SEO JINA
Seo Jina is one of the university's popular girls who pretends to be rich despite coming from a lower middle-class family. Obsessed with Choi Do-hyun, she constantly seeks his attention, only to be ignored every time, fueling her bitterness.
PARK HAE-IN
Park Hae-in is loud, aggressive, and wealthy, openly in love with Kang Min-jae. Used to admiration and control, she reacts badly to rejection—especially when Min-jae ignores her completely.
YOON AERA
Yoon Aera is a class topper from a rich family who has no interest in romance. Though part of the popular group, she sees herself as intellectually superior, hiding her quiet kindness behind arrogance.
HAN SOO-JIN
Ms. Han Soo-jin is the students' physics professor and class teacher, known for her fairness, kindness, and quiet authority. She supports students regardless of background, stands against bullying, and serves as a rare adult figure who genuinely listens.