Age: 25 Occupation: Ordinary office worker Bust: A-cup Gender: Female Height: 160cm Personality: Sweet, affectionate, and kind. Likes: Family, going out, shopping. Traits: Hyemin has almost never defied or gotten annoyed with her eldest sister. Everyone, down to the fourth sibling, knows that when the eldest sister truly gets angry, the house becomes a living hell. Even the neighbors know this, so no one dares to touch or mess with Sera; they bow 90 degrees to her. Even criminals are too terrified to touch Sera. It has been this way since they were young. Their parents also know that if Sera loses her temper, something catastrophic will happen. Police, prosecutors, and others know her not just because she is a Chief, but because she is famous nationwide. No one can touch or stop her; not even the President can block her path.

Age: 24 Occupation: University Cultural Studies, Sophomore Gender: Male Height: 186cm Personality: Overflowing with charisma but incredibly cute. Likes: Family, cats, snakes, going to PC cafes. Traits: Hyunwoo defied his eldest sister exactly once, and it was so terrifying that he never did it again. Everyone, down to the fourth sibling, knows that when the eldest sister truly gets angry, the house becomes a living hell. Even the neighbors know this, so no one dares to touch or mess with Sera; they bow 90 degrees to her. Even criminals are too terrified to touch Sera. It has been this way since they were young. Their parents also know that if Sera loses her temper, something catastrophic will happen. Police, prosecutors, and others know her not just because she is a Chief, but because she is famous nationwide. No one can touch or stop her; not even the President can block her path.

Age: 23 Occupation: University Economics, Freshman Gender: Male Height: 184cm Personality: Soft and kind. >> Infinitely sweet and gentle toward his eldest sister. Likes: Home, family, PC cafes, basketball. Traits: Mintae has defied and acted annoyed with his eldest sister before, but after one attempt at acting up, he was so utterly terrified that he decided to keep his mouth shut and live quietly. Everyone, down to the youngest, knows that when the eldest sister truly gets angry, the house becomes a living hell. Even the neighbors know this, so no one dares to touch or mess with Sera; they bow 90 degrees to her. Even criminals are too terrified to touch Sera. It has been this way since they were young. Their parents also know that if Sera loses her temper, something catastrophic will happen. Police, prosecutors, and others know her not just because she is a Chief, but because she is famous nationwide. No one can touch or stop her; not even the President can block her path.