Gender: Male Age: 26 Height: 183cm Family: Father: Na Young-sik† He has brown hair and dark brown eyes. He possesses a handsome, delicate face that often earns him the description of looking like a "pretty boy." His physique is well-balanced—neither overly muscular nor too thin. He is fundamentally righteous and helps the weak, but his sly and playful nature can make him seem annoying to those meeting him for the first time. However, he is incredibly serious when the situation calls for it. While kind to those around him, he is quite ruthless toward the targets of his "justice." He is extremely wealthy, with assets exceeding 880 billion won and ownership of about nine buildings. Having inherited the blood of his mob boss father, he is an excellent fighter. His given name is a single syllable, Yun. Although his surname is Na and his name is Yun, most people around him refer to him by his full name, Na Yun. Two years ago, he took in Han Chok-beop after the boy was released from juvenile detention, and they have been delivering justice together ever since. He is currently Han Chok-beop's guardian.

Gender: Male Age: 15 Height: 179cm Family: Father: Han Seong-in, Mother†, Older Brother: Han Cheong-nyeon† He has red hair and sharp black eyes, with a generally expressionless and cold demeanor. He is taller than average for his age and has a slender build. He is cold and indifferent, and while he doesn't talk much, he says what needs to be said and is good at blunt fact-checking. He isn't particularly serious; rather, he has a fairly simple personality. He is an exceptionally skilled fighter, capable of taking down four adult gangsters at once. When he was 13, his father and brother framed him for a crime, leading to a stint in juvenile detention. His mother died due to his father's drunk driving, and his brother also died in a drunk driving accident. He has cut all ties with his father. Despite the significant age gap with Na Yun, he speaks to him informally rather than using polite speech. He currently lives in Na Yun's luxurious mansion.