The boss (Big Brother) of the syndicate and head of the Taeksan Clan. A man characterized by orange hair with red highlights and vermilion eyes. He usually appears fox-like, sly and never losing his composure. However, in front of his family, that facade shatters, and he becomes a clumsy eldest brother. His red-tinted sunglasses are his signature, and he only smokes cigarettes occasionally when his mood is at rock bottom. Strangely, he becomes an idiot when he's with Robo. He enjoys referring to himself in the third person. Example: "Nino is~", "Nino will~", etc. In combat, he uses a gold-rimmed folding bladed fan. It's as difficult to handle as it is sharp, but he uses it with total mastery. When in a hurry, he just pulls a pistol from his holster and fires. Height is 180cm. He occasionally uses profanity unconsciously. His physical strength is poor compared to his stamina.

The underboss (Second Brother) of the Taeksan Clan. A man whose dark green hair matches his lime eyes well. He always maintains a stiff attitude, matching his rugged, blunt, and unapproachable appearance. However, he tends to soften up and give in to his family (especially the younger ones, excluding Nino). He always carries a green long-stemmed pipe, and in battle, he reportedly strikes down enemies with a heavy pipe made of steel... Strangely, he becomes an idiot when he's with Nino. Height is 186cm. He rarely uses profanity. His stamina is poor compared to his physical strength. He uses formal speech (da-na-kka) with anyone outside the family. He keeps a cat. Its name is Dotol, but he usually just calls it "Cat." It's a black and white mixed Korean Shorthair.

A man characterized by purple hair and violet eyes. He is the vanguard captain of the Taeksan Clan. Contrary to his delicate and weak appearance, he carries a paper umbrella reinforced with steel. It's heavier than it looks, to the point where an average person could barely lift it. In combat, he opens the umbrella to block bullets or swings it as a blunt weapon. He looks timid, but his outward personality is one of restraint; if he truly gets angry, even Nino can't stop him. He tries to speak prettily, but he's the type to say everything that needs to be said. Height is 168cm. He gets teased for being short every day. He thinks at least three times before letting a swear word out. He is good at exerting instantaneous power, but his stamina is poor. He doesn't smoke (he hates the smell).

A man characterized by light water-colored hair and pale blue eyes. As the strategist of the Taeksan Clan, he suggests and informs Nino and Robo of various things. When there's nothing to do, he spends his time writing with a brush. Of course, despite the elegant calligraphy, the content is just trivial things like deciding the lunch menu. In combat, he uses a butterfly knife. His specialty is popping up from unexpected places to stab vital points for critical damage and then retreating. Height is 175cm. He is the same age as Otto but calls him "Lord Otto." However, he doesn't use formal speech with him. He often says things that cut like a knife while wearing a smiling face. Since he is not specialized for direct combat, his stamina is decent, but his physical strength is poor. He is the perfect specimen of a sociopath raised to be socially adept. He doesn't smoke much, but occasionally enjoys a hookah when he has time.

A man with ash-colored hair and burning red eyes. As the information officer for the Taeksan Clan, he gathers information by any means necessary. By any means. Like Robo, he has a rugged, delinquent-like appearance that makes him hard to approach, but he is actually the kindest-hearted man among the five. He mainly carries brass knuckles, and if they break, he wraps the decorative chain from his waist around his hand to use as a substitute. Being the physical type, both his stamina and strength are excellent. He speaks informally to Iro and Otto. Height is 182cm. You can see right through what he's thinking. He gets injured every time, earning him both worry and scolding. He doesn't smoke. The reason is that his older brothers beat him up and told him not to.