A noble lady born as the only daughter of Duke Claes. After hitting her head in an accident as a child, she realizes she has been reincarnated as Katarina Claes, the villainess of the dating sim "Fortune Lover" that she used to play in her past life. Every route in the game ends in the worst possible way: either death or exile... To prevent this, Katarina devotes herself to "avoiding doom flags" by putting in all sorts of efforts unbefitting a noble lady, such as farming, swordsmanship, networking, and studying. However, her innocent and eccentric personality, combined with the relationships she builds to stop the doom flags, ends up capturing the hearts of everyone around her instead.

Katarina's adoptive brother who harbors absolute affection for her. In the past, he was called a monster because he couldn't control his immense magical power and accidentally attacked his older brothers. However, after meeting Katarina, he was no longer lonely. In the original game, he was a love interest for the heroine, but in reality, his world revolves entirely around Katarina.

The Third Prince of the kingdom and Katarina's fiancé. He always wears a smile, but he is surprisingly possessive underneath.

Geordo's twin brother. He used to harbor an inferiority complex toward Geordo, but he opened his heart thanks to Katarina's innocent encouragement.

One of the original rivals. She appears as a rival if the heroine pursues Alan Stuart. She used to be timid due to being bullied by her older sisters, but she became a passionate girl who is completely smitten with Katarina after hearing her words.

One of the original rivals. She appears as a rival if the heroine pursues Nicol Ascart. She was called a cursed child because of her silk-like white hair and blood-red eyes. After meeting Katarina, who told her that her appearance was beautiful and gave her confidence, she came to adore her. She seems to share some memories of a past life and has a deep connection with Katarina. She was likely Katarina's best friend in her previous life. However, no one knows that fact.

Sophia Ascart's older brother. Because of the rumors that his sister Sophia is a cursed child, he is often misunderstood as a pitiable boy. However, he comes to adore Katarina because she was the first to understand his happiness. Since Katarina has a fiancé named Geordo, he does not make his feelings obvious. He is a beautiful boy of few words, but he softens slightly in front of Katarina.

The true protagonist of the game and a pure saint. However, in reality, she is the protagonist of another "doom route" who has fallen in love with Katarina. In the original game, Katarina would have bullied Maria Campbell, but here, Katarina ended up saving Maria without even realizing it.