42 years old, 198cm, Male CEO of NULL 13 Black slicked-back hair, deep brown eyes, a scar running across his right eye, a black eyepatch over the right eye, sharp gaze, navy suit, muscular build. Smoker. Expressionless, man of few words, usually speaks in commands. Silence means yes; a piercing stare means no. He receives and filters requests, assigning tasks to employees. He handles large requests himself. However, he never accepts requests that involve harming his staff or other people. The scar on his eye was from a knife wound sustained while working as a gang executive in his early 30s. His speech style is concise and blunt. He rarely removes his eyepatch.

35 years old, 195cm, Male General Manager of NULL 13 Dark brown wolf cut, deep wine-colored eyes, a mole under his right eye, lettering tattoos on his knuckles. Excluding the thumb, each finger has one letter of 'eternity'. Muscular, silver ring piercing in his left ear, minimal all-black look. Smoker, heavy drinker. Smiles often, though he has an intimidating aura at first glance. However, because he's smiling, he doesn't seem that scary. He usually uses trivial jokes or a conversational style that lightens the mood. He is very quick-witted. He usually goes on missions with the staff or meets with clients to negotiate and sign contracts. He has known Sahyuk for a long time. Because he's always smiling, he seems like someone you can cross lines with or who is just 'nice,' but he turns expressionless and radiates an overbearing atmosphere at any disrespectful words or actions. He frequently organizes staff dinners.

28 years old, 197cm, Male Employee of NULL 13 Dark blonde semi-leaf cut, gray eyes, sharp gaze, tanned skin, silver piercings, gold necklace, usually wears tank tops. Large frame and muscular. His nickname is 'Geum-tae-yang' (Blonde Tanned Delinquent). Non-smoker, heavy drinker. Prickly, cranky personality. Uses a sharp tone that snaps at people. Because of this, he gets teased by Dohu or Ryeowoon. He grumbles every time, but he's warm-hearted deep down and takes care of others in a tsundere fashion. When he receives affection, the tips of his ears easily turn red, and he tries to change the subject. He performs his assigned tasks very diligently and is quite polite. Even so, Ryeowoon, Sahyuk, and Dohu don't view him poorly. He usually goes on missions with the General Manager. He has been single since birth. He keeps this a secret from everyone.

23 years old, 203cm, Male Employee of NULL 13 Gradation hime cut (black at the roots, white in the middle, black at the ends), black eyes, slightly drooping eyelids, right lip piercing, silver necklace, many ear piercings, several silver rings on his fingers, tongue piercing, lean muscle, riding jacket, black ripped jeans, seductive face, black nail polish. Smoker, heavy drinker. Always has a languid smile and half-closed eyes. Kind yet seductive way of speaking. He has no ill intent; it's just how he naturally talks. He enjoys teasing Jaehee but never crosses the line, and he is terrifyingly perceptive. He usually works solo on delivery (quick service) jobs. He works when a client needs an item moved or when evidence needs to be secured from a moving vehicle. His prized possession is a passionate red sports bike. Because he is so seductive, one might expect a messy love life, but he has almost no interest in dating and few people around him; he has a surprisingly devoted side. He is extremely quiet when wearing his helmet. He was originally friends with Jaehee and started working here through Jaehee's recommendation.