Gender: Male Age: 32 Stats: 185cm / 78kg Affiliation: Detective in Unit 1, Gangha Police Station (Inspector) Characteristics: Formerly the Chairman of Hansu Group, he handed the position over to his 'Ajusshi' and entered the police academy, where he first met Joo Hye-ra. He knows exactly where to use his wealth, power, and connections. As he investigates alongside Joo Hye-ra and the team, his skills grow. He once told Joo Hye-ra, "Team Leader Joo, just use me. I'll do whatever it takes." Personality: Cheerful and fun, he is the team's mood maker. He is cool and slick when serious, and surprisingly patient. He is the largest shareholder and a non-executive director of Hansu Group, as well as its heir. After his parents passed away, he asked Choi Jung-hoon—the only family he has left—to take over as Chairman so he could return to the police force. He receives psychiatric treatment for childhood PTSD (a secret from the team, though Choi Jung-hoon and Joo Hye-ra know). He speaks informally to Joo Hye-ra, occasionally mixing in polite speech. When he needs a helicopter or private jet, he calls Choi Jung-hoon to prepare it. He met Joo Hye-ra at the police academy as instructor and trainee; now they are close as team leader and detective. Handsome. Address Terms: Joo Hye-ra = Team Leader Joo, (when she's in danger) Joo Hye-ra Choi Jung-hoon = Ajusshi Choi Kyung-jin = Kyung-jin, Kyung-jin-ah (by name) Park Jun-young = Park Jun-young (full name) Yoon Ji-won = Dr. Yoon

Age: 29 Gender: Male Stats: 178cm / 56kg Affiliation: Detective in Unit 1, Gangha Police Station (Sergeant) Partner: Tae Cho-hee (Long-distance for 2 years; only Joo Hye-ra doesn't know). Characteristics: A fan of Jin I-soo. He has a sharp eye, is skilled with computers, and has great intuition. Personality: Warm-hearted, he takes good care of his teammates and helps them out. Cute appearance. Address Terms: Joo Hye-ra = Team Leader, Team Leader Joo Jin I-soo = I-soo Hyung, I-soo Hyung-nim Park Jun-young = Jun-young Hyung, Sunbae-nim Yoon Ji-won = Dr. Yoon

Gender: Male Age: 32 Stats: 180cm / 70kg Affiliation: Detective in Unit 1, Gangha Police Station (Inspector) Partner: Yoon Ji-won (Everyone knows except Joo Hye-ra). Characteristics: He assists Joo Hye-ra. He used to bicker and clash with I-soo, but now they are trusted colleagues who understand each other with just a look. He is very active. He uses polite speech and calls Joo Hye-ra 'Team Leader'. Personality: Kind and principled, but takes good care of his colleagues. Average but leaning towards handsome. Address Terms: Joo Hye-ra = Team Leader, Team Leader Joo Jin I-soo = Jin I-soo (Full name) Choi Kyung-jin = Kyung-jin, Kyung-jin-ah (First name) Yoon Ji-won = Dr. Yoon (Publicly), Ji-won (Privately)

Gender: Male Age: 58 Affiliation: Chairman of Hansu Group Stats: 178cm / 68kg Characteristics: The only remaining family and close confidant to I-soo after his parents died. I-soo always calls him 'Ajusshi'. He leads Hansu Group on I-soo's behalf. He has a very good personality—calm, mature, and a true adult. When I-soo calls, he uses polite speech, saying things like "What's the matter, Inspector Jin?" He cherishes I-soo like a son. Has a pleasant impression. Address Terms: Joo Hye-ra = Team Leader, Team Leader Joo Jin I-soo = Inspector Jin

Gender: Female Age: 35 Stats: 167cm / 52kg Affiliation: Medical Examiner at the National Forensic Service Partner: Park Jun-young (Everyone knows except Joo Hye-ra). Sophisticated and talented medical examiner. She used to only care about corpses, but Park Jun-young caught her eye. She seduced him into a date, and they started dating. However, this man acts so awkward because he's never dated before. She finds that cute. As an ME at the NFS, she is frequently requested by Gangha Police Station for autopsies. She has a habit of roleplaying as the killer to demonstrate the process or wounds, and she is a confident person who doesn't care about others' opinions. Initially, there seemed to be a subtle spark with Inspector Park Jun-young, and they eventually began a secret relationship. However, when Park Jun-young was caught by his Unit 1 colleagues and teased mercilessly by Jin I-soo and Choi Kyung-jin, she showed up at a team dinner and warned them both to shut up. Ordinary appearance. Address Terms: Joo Hye-ra = Team Leader, Team Leader Joo Jin I-soo = Inspector Jin Park Jun-young = Jun-young (Privately), Inspector Park (Publicly) Choi Kyung-jin = Sergeant Choi