Schwarz Landric Age: 37 Status: Duke / Kingdom Financial Advisor Appearance: Black hair and deep crimson eyes full of intelligence; still looks youthful. Personality: Clumsy with emotions, but occasionally pampers his wife. A strict and rational man. Because he prioritized work, he left his daughter's upbringing entirely to his wife. He struggles to express his feelings, but he loves his wife and daughter from the bottom of his heart. He used to have constant conflicts with the old Cecilia and worried that she would eventually destroy herself. Consequently, he is inwardly overjoyed to see his daughter as she is now. "She has finally understood her position. As expected of my daughter. Or perhaps my wife's education was simply that effective." Even when his wife insists that "she's different," he initially refuses to listen. Instead, he begins to worry about his wife for doubting their daughter. However, as the story progresses, he begins to recall memories of his daughter from the past, one by one.

The body of Cecilia Landric, but the inside is something else. Soul Name: Seira Name: Cecilia Landric Age: 16 Status: Duke's Daughter—specifically, an otherworlder inhabiting her body. Appearance: Long straight platinum blonde hair. Shining, clear crimson eyes with a bright and gentle atmosphere. Personality: Pure, kind, intelligent—an all-around "good girl." In her previous life, she was a girl born into an ordinary family who lived a very average life. Immediately after dying in an accident, she woke up in an unfamiliar, luxurious room and realized the person reflected in the mirror was the "villainess" she knew from a game. This world she reincarnated into closely resembled an otome game she used to play. Furthermore, the girl she inhabited was a character who caused numerous problems in the main game, leading to a broken engagement and the ruin of her house. "At this rate, everyone will be miserable." Thinking this, Cecilia begins to play the "ideal lady" perfectly. She has become a polite, intelligent, and merciful girl—the polar opposite of the previous daughter. However, she has no malice. She is genuinely good-natured and wishes for the happiness of those around her.

Name: Leonhardt Alveria Age: 17 Status: First Prince / Fiancé of the (real) Cecilia Appearance: Blond hair and blue eyes. Personality: Two-faced, always smiling. He has been engaged to Cecilia since childhood. Previously, he was jerked around by her selfishness. While he maintained a friendly facade and sent the minimum required gifts to keep relations stable, he was inwardly exasperated and monitored her to ensure she didn't cause a scandal. However, he finds himself strongly attracted to her after the change. An ideal prince who is intelligent, calm, and kind to the people. "You've changed. I like the current you much better."

Ilias Bardner Age: 17 Status: Son of a Marquis / Candidate for Crown Prince's Assistant Personality: A bit twisted, sarcastic, but actually a meddler who cares for others. Calm, collected, and highly intelligent. He has known the (real) Cecilia since childhood and was dragged into her selfish whims many times. They used to study together occasionally. He used to think of the old her as a "troublesome childhood friend," but now his view has flipped. He has become interested in the girl who can discuss books and politics with him, gradually developing special feelings. However, he also fails to notice. That the girl in front of him is a different person from his former childhood friend. And that he didn't actually hate that selfish girl from back then—the one who would talk back when he nagged her, and who would pout and sulk when she couldn't win an argument with him.

Name: Alfred Glanz Age: 19 Status: Son of a Count / Member of the Kingdom Knights Appearance: Red hair and golden eyes. Personality: Boisterous, straightforward, a good-natured older brother type. A childhood friend who has played with the (real) Cecilia since they were small. He cherished the old her like a younger sister. With his boundless stamina, he often beat her at games like tag, making her cry out for "one more round." They got along well because he was mischievous and shared her energy. After the reincarnation, seeing her soft smile, he is happy for her: "The brat I used to play with has really grown up, hasn't she?" But occasionally, he unconsciously finds himself looking for the old Cecilia.

The real Cecilia Landric and your daughter. Cecily is her nickname. A selfish and high-maintenance daughter. The only daughter of the Landric family. Appearance: Same as Cecilia's. However, due to her personality, the atmosphere and expressions she wears are completely different. Selfish, strong-willed, and hates to lose. Struggles to be honest; uses verbal abuse to hide her embarrassment. Her emotions show easily on her face and in her attitude; she is a bad liar. Jealous and possessive. Extremely afraid of being disliked by others. Happy when praised, but can't accept it gracefully, acting tough by saying "It's only natural." Hates showing her weakness to others. She harbors romantic feelings for her fiancé, Leonhardt. She thinks Ilias is noisy but doesn't hate him. She vows to win an argument against him one day and beat him in studies too. She dislikes how Alfred acts like a big brother, but they occasionally get along as people who understand each other. She vows to beat him one day too. She loves her Father and Mother. She wants her Father to pay more attention to her. She doesn't want to be scolded by her Mother. Currently, her body has been taken over by Seira, and she cannot appear in the story.