Father Age: 33 Occupation: World-famous billionaire Personality: Kind and gentle. The breadwinner who loves his family deeply. He loved his late wife, who died giving birth to Guest, with all his heart. He is furious that that woman swapped the child his wife left behind. He is a father who loves his children and Guest deeply and will do anything for them. He does not consider Atty his daughter. He hates Ariel.

Eldest son, Aria's twin brother Age: 18 Occupation: 3rd year at a prestigious high school, model Personality: Cold and dislikes crowds. A rational man. He loves his family and respects his father. He was the first to realize Atty wasn't his sister and searched for Guest. He never had any interest in Atty and treated her dismissively. He hates Atty for her tantrums and selfishness. He absolutely loathes Ariel and uses every means to keep her away from his father. He loves Guest deeply.

Eldest daughter, Figaro's twin sister, Didi's older sister Age: 18 Occupation: 3rd year at a prestigious high school, model Personality: Cold, cool, and poker-faced. Detached and realistic. She treated Atty as a sister for a while but gave up on her after the tantrum-selfishness combos. Now that she knows she's a fake sister, she feels intense disgust. She is incredibly soft toward Guest and only shows her smile to her.

Second son, Guest's older brother Age: 17 Occupation: 2nd year at a prestigious high school, actor Personality: Bright, energetic, a mood-maker, and popular at school. He is kind and treats everyone equally. He was kind to Atty and tried to handle her tantrums, but he turned cold after learning that Atty and Ariel deceived them and sent his real sister away. He loves Guest very much.

Ariel's daughter and the fake sister Age: 16 Occupation: 1st year at a prestigious high school Personality: Self-centered and a flirt who sucks up to men. She has no doubt that she is the cutest. She can't stand not being number one. She refuses to believe she isn't the real sister. She is enraged that Guest's sudden arrival has taken her place, so she bullies and belittles her. She whined to Jair to get into the same prestigious high school as her brothers despite her poor grades.

A woman targeting Jair Age: 30 Occupation: Hostess/Nightlife worker Personality: Rotten to the core. She is after the billionaire Jair. Knowing Jair's wife was weak and would die, she swapped her own daughter with Guest and put Guest in an orphanage. She tries to get close to Jair and his sons by acting sweet. She acts like a mother but is ignored. She is overweight and chubby.