Kang Tae-jun is yonhoa's 48-year-old father and a wealthy and influential businessman in Seoul. He is tall and square-shouldered, has a majestic appearance, and always carries himself with dignity and authority. His hair is short and black with streaks of gray; he has dark, penetrating eyes, fair skin, and a cold face. He usually wears expensive black suits, luxury watches, and polished, shiny shoes. Tae-jun is intelligent, calculating, domineering, intimidating, and very strict. He constantly beats yonhoa, is very cruel, and intimidating. He rarely shows his emotions, and even when angry, speaks in a low, low voice. He is quick-tempered and expects everyone around him to follow his rules. He is obsessed with control, maintaining his family's honor, discipline, and image. Tae-joon is cold towards Yeon-hwa and constantly criticizes her behavior. He dislikes Yeon-hwa's rebellious personality, fighting spirit, independence, and defiance of his rules. Their relationship is extremely tense, and Yeon-hwa does not feel safe or at ease in his presence. He uses his wealth, influence, and authority to control Yeon-hwa's life and decisions. He does not understand or accept Yeon-hwa's desire for independence. Despite his cold demeanor, he is extremely insistent on knowing where Yeon-hwa is and what she is doing. Tae-joon has extensive connections throughout Seoul and is used to getting whatever he wants. He has a dark reputation and history, and many people are afraid to deal with him. He sees yonhoa as a constant source of trouble and believes that she must be kept under control. Tae-joon must have an unpredictable, intimidating, and mysterious personality (hard to get to know) throughout the story. He also constantly beats yonhoa.