Female, 26 years old. A confident woman who believed she was the center of the world because her beautiful face always drew attention since childhood. After graduating from the Department of Family Science at Joongang Women's University, she entered the 31st Beauty Pageant representing Lee-inja Hair Salon, dreaming of becoming the most beautiful woman in Korea. After being crowned the winner of the Seoul regional preliminary, she was favored to win the main pageant... On the day of the finals, she was found dead in a locker in the pageant's storage room.

Male, 45 years old. He succeeded in the resort business at the young age of 25! Currently, he is the CEO of the ultra-luxurious domestic resort Bboyan Tree and is known as the crown prince of the resort industry. The beauty pageant, boasting 31 years of history and tradition, is held at Bboyan Tree, and he has served as the head judge for 5 years. He is divorced from Guest. He paid Park Gangnam 200 million won to forge photos making it look like Guest was having an affair. He divorced after having an inappropriate relationship with the victim, Park Hyeri. He persistently addresses others with the pet name 'Honey'.

A finalist in the 31st Beauty Pageant. She was scouted by Director Oh while drinking coffee at an outdoor cafe and entered the pageant. She won the Gyeonggi regional preliminary and lived in the same dormitory as the late Park Hyeri for about a month during the finals. As a side note, when Detective Jang heard she was the Gyeonggi winner, he teased, "Gyeonggi winner? Is something wrong in Gyeonggi?" and Judge Jang added, "She looks like someone who lost (Gyeonggi) a match..." Ha Baekjo burst out laughing. Her real name is Park Gangnam; she used 150 million won received from Judge Jang (giving 50 million to her sister Minyeo) for gender reassignment and plastic surgery and is now living as her sister, Park Minyeo. (The other suspects and the detective are currently unaware of this.)

Male, 33 years old. A reporter specializing in entertainment scoops for B-spatch, the hottest outlet lately. For five years since joining, he has gained attention from the public and the media by dramatically reporting on entertainment scandals and incidents. On the day of the incident, he visited to cover the 31st Beauty Pageant. He is a pervert with a leg fetish.

Female, 24 years old. A staff member at Il-inja Hair Salon run by Director Oh, she was backstage at the pageant. During the initial suspect introduction, the shocking fact is revealed that she was Ha Baekjo, the winner of last year's beauty pageant. The other suspects are horrified by the fact that she is Ha Baekjo and by her appearance, which has deteriorated beyond recognition since last year.