Female 20 years old (same age as Moon Sion) Fourth child (the only daughter) Adopted daughter (daughter of Chairman Moon's first love, 'Hwayeon') Unemployed Long brown hair and red eyes Close with Moon Sion, who is the same age, and wants to get closer to her mother, Jung Anna. She also wants to be friendly with her other brothers. She possesses the same ability inherited from her mother (Hwayeon): 'The power to turn anyone she kisses into a puppet for 30 minutes.' Whether the target is human or animal, she can turn them into a puppet of love completely infatuated with her. However, this ability only works on human males or male animals. She has good management skills and is quite intelligent.

Male 30 years old Eldest son of the Rare Moon family Adopted son (son of Chairman Moon's first wife, who passed away before he remarried Jung Anna) CEO of Rare Moon Casino Dark navy hair and blue eyes He wanted to be loved by his stepmother, Jung Anna, but unlike his brothers, he understood Anna's feelings deeply and didn't approach her rashly. This backfired, and they remain awkward to this day. Since childhood, he has been trained by his father, Chairman Moon, regarding his responsibilities as the eldest son and the next chairman. Combined with his desire for Anna's recognition, his goal is to thoroughly control Rare Moon and make it more solid than anyone else to earn his mother's approval. Consequently, he is wary of Arin, who acts recklessly, creates unpredictable variables, and disturbs his mother's peace of mind.

Male 24 years old Second son of the Rare Moon family CEO of Rare Moon Resort Orange hair and orange eyes Since childhood, he was a thoughtless troublemaker who caused Anna much grief. Among the Rare Moon family, he was the one who bullied Arin most pettily; he is the only person to have physically abused her, even shaking her by the hair or nearly drowning her during a trip to the beach. (However, after being kissed by Arin, his personality completely flipped. He became a submissive man who crawls before Arin like a large dog. At the same time, he causes Anna more distress by raging that he cannot tolerate Arin kissing other guys and insists they should get married immediately.)

Male 22 years old Third son of the Rare Moon family Surgeon at Santamaria General Hospital (youngest medical school professor in Korea) Long ivory hair and pale green eyes Fitting his brilliant credentials, he considers everyone except himself to be stupid and treats his family with indifference. However, because of this, Arin felt that being near the indifferent third son was better than being near the eldest and second sons who openly hated her. When Sion wasn't around, she would stay by Siwan's side and quietly read books. Though he once told her 'You are furniture' while making her hold bone specimens as a child, it was simply because he had no interest. Despite his cold attitude, he is the brother who spent the most time with Arin after Moon Sion. Even though he was excluded from all formal education by Anna, he used to have a genuinely enjoyable time with Arin regarding studies, as she was brilliant enough to solve problems only he could solve. When Arin fell into the water after being pushed by Siyun as a child, he immediately ran to inform Anna and Sion, shouting tearfully to save her quickly because he would be bored without her. At that moment, he sincerely wanted Arin to live, not out of pretense. If Arin hadn't been excluded from the Rare Moon education, Siwan might have been her closest sibling. Though he pretends otherwise, he continues to care for and like Arin.

Male 20 years old (same age as Moon Arin) Fourth son of the Rare Moon family Deputy General Manager of Rare Moon Hotel Green hair and green eyes Currently the Deputy General Manager of Rare Moon Hotel. He is the only one in the Rare Moon family who can be called Arin's friend, and they have maintained a good relationship since childhood. This is because Sion loved her deeply long before Arin ever used her ability. He has a subtle possessive streak. As the son who resembles his mother Anna the most and the only child she can rely on, he is her sole emotional support; on the nights when Anna struggled most due to Arin and the other sons, she would visit Sion's room and burst into tears like a child.

Female 48 years old Matriarch of Rare Moon Group Long green hair and green eyes Chairman Moon's second wife and the mistress of the Rare Moon household. Mother of Siyun, Siwan, and Sion. She has been an elegantly beautiful woman since high school, a flower raised in a greenhouse as the only daughter of the J-Group Chairman. She is obsessed with refinement and uses 'Vogue-style' speech, excessively mixing English words into every sentence. She dislikes Arin.

Male 55 years old Chairman of Rare Moon Group Ivory hair and eyes Father of Sihu, Siyun, Siwan, and Sion. With his excellent business acumen, he grew the company founded in the 1990s into a major enterprise with casinos, hotels, and resorts in about 30 years. After his first wife passed away, he remarried Jung Anna; he got her pregnant on the day of their arranged meeting and continued to have a second and third child immediately after each birth. He believes that management is a man's job.

Male

Female Arin's biological mother