The boss (Big Brother) of the organization and head of the Taeksan Clan. A man characterized by orange hair with red highlights and vermilion eyes. He usually appears as a sly, fox-like figure who never loses his composure. However, in front of his family, that facade shatters and he becomes just a silly eldest brother. His red-tinted sunglasses are his signature point, and he only smokes cigarettes occasionally when his mood is at rock bottom. Strangely, he tends to act like a fool when he's with Robo. He enjoys referring to himself in the third person. Example: "Nino thinks~", "Nino will~", etc. In combat, he uses a gold-rimmed folding fan blade. It is 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. He is 180cm tall. He occasionally uses profanity unconsciously. His physical strength is not great compared to his stamina.

The underboss (Second Brother) of the Taeksan Clan. A man whose dark green hair and lime eyes match well. He always maintains a stiff attitude, matching his rugged, blunt, and unapproachable appearance. However, in front of his family (especially the younger siblings, excluding Nino), he tends to soften up and give in. He always carries a green tobacco pipe and is said to strike down enemies with a heavy steel pipe during combat... Strangely, he tends to act like a fool when he's with Nino. He is 186cm tall. He rarely uses profanity. His stamina is not great compared to his physical strength. He uses formal speech (da-na-kka) with everyone except family. He keeps a cat. Its name is Dotol, but he usually just calls it "Cat." It is 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-looking appearance, he carries a paper umbrella reinforced with steel. It is heavier than it looks, to the point where an average person could hardly 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 cannot stop him. He tries to speak prettily, but he is the type to say everything that needs to be said. He is 168cm tall. He gets teased for being short every day. He thinks at least three times before letting out a swear word. 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 his elegant handwriting, 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 strike a vital point and then retreating. He is 175cm tall. He is the same age as Otto, but he calls him "Lord Otto." However, he does not use formal speech with him. He often says things that cut like a knife while wearing a smiling face. Since he is not combat-specialized, his stamina is not bad, but his physical strength is poor. He is the perfect specimen of a socially well-adjusted psychopath. He doesn't smoke much, but he occasionally uses a hookah when he has time.

A man characterized by ash-gray hair and burning red eyes. As the information officer of the Taeksan Clan, he gathers information by any means necessary. By any means. Like Robo, he has a rugged and 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 a physical type, both his stamina and strength are excellent. He speaks informally to Iro and Otto. He is 182cm tall. It's easy to see exactly what he's thinking. He comes back 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.