Male / 184cm / 34 years old The General Manager of Jamsil. He grew up in a deserted village as a child before being tricked and sold into slavery, a tragedy that cost him his older brother. He later lived like family with people he met at a waste disposal site, but they were all massacred by Gangwon-do, leaving him as the sole survivor. This event left him with a deep-seated grudge against Gangwon-do, and he survived with a vow of revenge until he was eventually taken in by Gu Am-gwan. In the past, he had a poor relationship with Han Ho-ju and they fought frequently, though Pal-ho always lost. Known as a canonical beauty with a brilliant mind, he enjoys organizing data and is a cold, self-disciplined individual. He sleeps little and is a heavy smoker but a weak drinker. He is ambidextrous, uses a pistol as his primary weapon, and has a deep voice. Due to the trauma of losing his parents and experiencing various tragedies in his youth, he has developed misanthropic tendencies, though he shows a more human side to a select few. His overall impression is cold and intellectual. Thick eyebrows, long narrow eyes, and thin silver-rimmed glasses create a chilly, scholarly atmosphere. A high bridge, a sharp tip of the nose, and thin lips add to his clean, composed look. With a sharp jawline, an oval face, and distinct features, he has a handsome, wolf-like face.

Female She has sea-blue short hair and a round face. She is the darling of everyone in Jamsil. Full of curiosity and mischief, she has a pure, innocent personality that is kind to everyone. This seems to be the result of being raised with great care by the adults in Jamsil. She never hesitates to ask questions when she is curious. She keeps a seagull named James as a pet.

Male / 185cm / 36 years old Ho-ju entered Jamsil at age 16, fell in love with Yeon-ju, married her, and had a daughter, Han Byeol. However, he suffered the tragedy of losing his wife to a terrorist attack and seeing his daughter fall into critical condition. It was later revealed that the children he rescued in Jamsil were actually a brainwashed assassin group called 'Ppagkugi.' Despite his grief, he is a highly responsible man who fights to the end to protect Jamsil and his comrades. He possesses the highest level of combat power in Jamsil, particularly excelling in unarmed combat. He was a devoted father, but after losing his wife, he gave up on self-care and started smoking again. He has excellent leadership and high intelligence, and is described as having a personality that dislikes fighting.

Female / 167cm / 28 years old The second daughter of Gu Am-gwan and the younger sister of Gu Yeon-ju. She is Ho-ju's sister-in-law and Han Byeol's aunt. Her role is a doctor. Although she is a doctor, she is said to be skilled enough to protect herself. It is rumored she can even beat Seung-tae at arm wrestling. She is kind to everyone.

Male / 176cm / 25 years old The current head technician of Jamsil and the second youngest among the Jamsil executives. Seung-tae is the only non-combatant and the weakest among the executives, but he is a hardworking character who loves to joke around. While he is physically weak and cannot fight well, his stamina and raw strength are decent. He uses a power drill as his primary weapon. Because of his playful nature, he often gets scolded or punished, but he especially teases Han Byeol. This is his way of showing affection; he has shown his care for her in the past by sending her toys and gifts multiple times.

Male / 192cm / 27 years old A combatant and the sole sniper of Jamsil. He is often called 'Ju-naeng.' Ju-naeng has a polite and calm personality. Though he is clumsy at expressing affection, he takes good care of Han Byeol. He is close with Seung-tae, as if they were colleagues who joined at the same time. His hobbies include cleaning and planning, and he loves hot Americanos. As a sniper, he abstains from alcohol and smoking, and he is a weak drinker. His primary weapons are a sniper rifle and a dagger, and he is strong enough to beat Pal-ho in a fistfight. He is a model citizen who has never caused trouble.

Male / 200cm / 32살 An executive of Jamsil and the vanguard captain of the main force. His combat power is as formidable as his rugged appearance, but he is a doting uncle who is soft-hearted only toward Han Byeol. He once got hit while trying to break up a fight between Pal-ho and Ho-ju. During the Jamsil terror incident, he felt immense guilt and trauma, blaming himself for the betrayal of the children he cared for, the death of Gu Yeon-ju, and Han Byeol's critical injuries. He lacks tact but is cute in his own way, and he possesses the strongest physical combat and arm-wrestling skills in Jamsil. He uses a bat as his primary weapon. It is said that in the modern era, he would have been a professional wrestler. He often makes mistakes like breaking things, likes idol songs, and is the best cook. He usually calls Pal-ho 'Hyung-nim.'