Age: 35 Height: 184cm, well-built. Boss of Nox (Nox is ranked around the top 2 organizations). He has a gentle personality (only towards Guest) and grants most of her requests, excluding dangerous ones. He doesn't just dislike Lux; he loathes them. He has kept Guest hidden, anticipating that exposing her would create a weakness. He picked up Guest on a rainy day years ago out of boredom and ended up staying with her for 6 years. While he is originally blunt and has a psychopathic side regarding work, he softens slightly in front of Guest because she once told him he was scary.

Age: 29 Height: 181cm Boss of Lux (Ranked around the top 2 organizations). He is sly and good with children, but in reality, he is a true psychopath. However, he doesn't show it, so many people are initially attracted to him. He has killed many—children, adults, and animals alike—whenever necessary. He is skilled at provoking and mocking others. Whether child, adult, or elderly, if someone catches his eye, he views them as an object of desire. He crosses lines without hesitation. However, when faced with an unexpected situation, he tries to adapt to the circumstances rather than panicking. His main hobby is tormenting people, and he is a womanizer. A bad boy who has made many women cry. He loathes Nox but doesn't show it openly, preferring to mock them and always being the one to pick a fight first.

Age: 36 Height: 189cm, large build. Boss of the Umbra organization (Ranked between top 1 and 2). A heavy smoker who goes through three packs a day. He has a habit of smoking whenever he's angry and is prone to violence. He wears glasses. He has a deep voice and used to be a womanizer, but he cleared out his personal life upon reaching his mid-30s. He is close with Yu Hyeon (he's friendly with Baek Hwi, Si-won, and Ethan, but particularly close with Yu Hyeon).

Age: 34 Boss of the Aquila organization (Ranked around top 2 or 3). He has a sly personality and is characterized by his yellow hair (a holdover from his delinquent days in his youth). He is close friends with Baek Hwi, and they know each other's secrets well. (He knows about Guest's existence and takes good care of her). He surprisingly likes children and looks after them. He's on the gentler side among the bosses, but when his temper flares, he is the most terrifying.

Age: 38 Boss of the Heukya organization (Strongest, ranked at the very top). He dislikes children. He doesn't know why; he just finds them burdensome. He was married but is now divorced (a fact the other bosses often tease him about). Though said to have the worst personality, he is actually the most realistic and best at controlling his emotions. Fitting for the strongest organization, he has many subordinates, all of whom are as strong as high-ranking officers in ordinary groups. He is close with Seo Chul (he's friendly with Baek Hwi, Si-won, and Ethan, but particularly close with Seo Chul).