The eldest daughter of the massive Jaeyul Group and the untouchable queen of Jooshin High School. Emptiness behind the Coldness: Unlike her glamorous and perfect exterior, she hides deep, unspeakable secrets and fears within, always exuding an air of emptiness and coldness. Compulsive and Defensive Attitude: She harbors an extreme fear of her strict father, who cast out her biological mother. Because of this, she is extremely cautious not to bring shame to her family and keeps walls up around everyone. Sacrificial Nature: To protect those she loves, she has a strong tendency to suppress her emotions and endure pain alone, such as suddenly breaking up with her long-time lover, Kim Ri-an. Gender: Female

The top-ranked student and absolute ruler of Jooshin High. The heir to Jooshin Group, the founders of Jooshin High School. Within the school, his word is law, making him an absolute power. Arrogance and Cold-bloodedness: Having possessed everything since birth, he looks down on others and is ruthless toward those who defy his order. Extreme Obsession and Devotion: His world revolves solely around Jung Jae-i. He is deeply shaken by Jae-i's breakup notice. He shows an obsessive devotion, displaying strong hostility and violence toward Kang Ha for getting involved with her. Emotional Deprivation: While he appears to be the perfect son and heir, he grew up under cold parents with whom he barely shares a meal once a year, leading to severe emotional deficiency and loneliness. Gender: Male

The youngest daughter of International Yoon, a leading domestic trading company. Another queen of Jooshin High. Hot-headed and Provocatively Honest: A transparent and fiery personality who expresses her emotions exactly as they are without shame. Her likes and dislikes are written all over her face. Strong Jealousy and Inferiority Complex: She always feels like a 'perpetual second-in-command' in the shadow of Jung Jae-i. Driven by a desire for the Queen's seat and possession of Kim Ri-an, she doesn't hesitate to act with sharp glares and thorny behavior. Gender: Female

The second son of a powerful political family that has produced generations of ministers. A close friend who grew up with Ri-an, Jae-i, and He-ra since childhood. Kind and Reliable Supporter: On the surface, he shows a gentle and sweet personality among his friends, without any rough edges. He doesn't care much for rank battles and takes on the role of the reliable anchor within the group. Secret and Dangerous Hidden Side: Having grown up under the strict control of his parents and the hypocritical pressure of a political family, he possesses a twisted inner self. He deepens the mystery of the story by maintaining a shocking secret relationship that must never be discovered within the school. Gender: Male

A scholarship student who intentionally enrolled in Jooshin High to seek revenge for his brother (Kang In-han), who died in a mysterious accident. Iron Fist in a Velvet Glove & Bright Smile: Initially, he shows a bright and seemingly oblivious side, never losing his smile even in the cold school atmosphere that ignores scholarship students. Fearless and Steadfast: He doesn't care about what others think and isn't intimidated even in front of Kim Ri-an, the top of the elite hierarchy. He has the drive to push forward relentlessly toward his goals. Thorough Planning: He approaches Jung Jae-i and commits provocative acts to break the rigid class order of Jooshin High and uncover the truth. Gender: Male

A teacher at Jooshin High School who is in a secret relationship with Lee Woo-jin that no one in the school knows about. Gender: Female

A key member of Kim Ri-an's inner circle. The third son of the Army Chief of Staff and the top fighter/rebel of Jooshin High School. Actions in the Story: While he acts with a sense of loyalty under Kim Ri-an's power, he is actually one of the core perpetrators who personally assaulted and persistently bullied the scholarship student Kang In-han (Kang Ha's brother). Gender: Male

A high-ranking bully who always hangs around with Choi Yoon-seok at Jooshin High School. Actions in the Story: Like Choi Yoon-seok, he leads the malicious acts of inhumanely ignoring and tormenting scholarship students under Kim Ri-an's tacit approval or orders. Gender: Male

A core upper-class student at Jooshin High who is always seen with Yoon He-ra and Ryu Ba-da. Characteristics: Boasts a glamorous visual and, under Yoon He-ra's lead, actively participates in keeping Jung Jae-i in check or joining in on various school gossip. Gender: Female

A close friend of Yoon He-ra and Gil Ye-ji. Characteristics: Distinguished by her short bob hairstyle. As part of the trio with He-ra and Ye-ji, she enjoys parties and displays the typical behavior of a Jooshin High bully, either ignoring or standing by while scholarship students are mistreated. Gender: Female