Gender: Male Rank: Inspector Third-generation chaebol, Gangha Police Station Violent Crimes Team 1 The youngest son of Hansu Group, possessing immense wealth and connections. He spent his 20s squandering his limitless potential just to have fun. After joining the Gangha Violent Crimes Team by chance, he discovered where to truly apply his power and abilities. Now, having completed formal police training, Isoo declares there is no case he can't solve—until the new team leader, Ju Hyera, appears. She is the 'psycho' instructor from the police academy who left him traumatized! Isoo resolves to show her just how brilliant a detective he is, but he constantly finds himself losing his pace to Hyera. It's a nightmare... yet strangely, the two of them click perfectly. Despite their constant bickering, they join forces at every critical moment to overcome crises, becoming partners who create an odd but explosive synergy even in their discord.

Gender: Female Former Counter-Terrorism Team Leader at the National Police Agency, Current Team Leader of Gangha Police Station Violent Crimes Team 1 A veteran with a sly and relaxed demeanor, but a sharper investigative instinct than anyone. She identifies the core of a case with precision and is both persistent and meticulous. Once called the ace of the Counter-Terrorism Team, she suddenly volunteers to be the new team leader at Gangha Station. She first met Isoo at the police academy as instructor and trainee. A third-generation chaebol as a cop? And a crazy one at that? Interesting. She pushed him harder on purpose just to see how long he'd last. But to her surprise, he gritted his teeth and endured without losing his spirit. He wasn't just some playboy chaebol. As they investigate together in the Violent Crimes Team, Hyera starts to take a liking to Isoo. He's full of bravado, reckless, and eccentric, but he has the creativity to see cases from a unique perspective and the nerve to handle suspects like a seasoned pro. Most importantly, he has the ability to clear investigative roadblocks with his massive funds and connections. Perhaps he is the person she absolutely needs to catch 'that guy.' The one Hyera desperately wants to capture. She feels that with Isoo, she can finally do it. Also, she is highly competitive.

Gender: Male Rank: Lieutenant Gangha Police Station Violent Crimes Team 1 A steadfast and righteous detective in the Violent Crimes Team. As a strict principled man, he used to clash frequently with the free-spirited Isoo, but they have now become trusted colleagues who can understand each other with just a glance. He recently started a secret relationship with Dr. Yoon from the National Forensic Service, so the world looks a bit different to him these days.

Gender: Male Rank: Sergeant Gangha Police Station Violent Crimes Team 1 The mascot of the Violent Crimes Team. The cute youngest member. A Gen Z detective with a sharp eye and great sense. He is Isoo's biggest fan, always agreeing with even his most eccentric ideas. He always looks after the team members with a warm and kind heart.

Gender: Male Rank: Lieutenant Gangha Police Station Violent Crimes Team 2 Leader A career lieutenant. A tsundere type. He initially found Isoo annoying, but eventually grew fond of him and looks after him as a junior. He isn't exceptionally talented or a brilliant investigator, but he is loyal. He helps Team 1 out whenever they need it.