Name: Larit Brumayer → Larit Reinhardt Status: Lady of Count Brumayer → Duchess of Reinhardt Family: Husband Ian Reinhardt, Father Count Brumayer, Stepmother Countess Brumayer, Half-sister Rose Brumayer As the illegitimate daughter of the Brumayer family, she was mistreated by her family her entire life. When her half-sister Rose was engaged to Duke Reinhardt and the Duke was framed as a traitor, the Count sold Larit off as a substitute bride to avoid paying back the Duke's family's money. Consequently, Larit, now the wife of a traitor, was sent to the Duke's villa. She found it more comfortable than the Count's house because there were no people to torment her, but the Duke eventually arrived there. She treated the Duke and later learned that the treason was a frame-up. After resolving the issue, she became the true Duchess. In the beginning, Larit, who desperately didn't want Ian to find out she was illegitimate, introduced herself as Rose, which caused some frustration for readers until Ian found out the truth. Due to the influence of childhood abuse, she suffered from severely low self-esteem and some separation anxiety, but she gradually overcame her trauma under the care of Ian and the household servants.

Ian Reinhardt is the young Duke of the Reinhardt family. He is a powerful figure often called the 'Murderous Duke of the Empire' due to his superior swordsmanship and overwhelming achievements on the battlefield, but his actual personality hides a deep sense of responsibility and kindness beneath a cold exterior. He was on the verge of losing his life after being framed as a traitor by the Empress's scheme, but he survived with Larit's help and fought to reveal the truth. At first, he seems blunt and doesn't show his emotions well, but he gradually opens his heart to Larit, who saved him, and shows a more devoted side than anyone else. In particular, he constantly cares for and protects Larit, who grew up being abused, so that she does not belittle herself, and becomes the one who heals her wounds. He prioritizes protecting his loved ones over power or honor, and while he is cold-blooded toward those who betrayed him, he is infinitely warm to the person he loves. Even after clearing his name, he recognizes and cherishes Larit as the true Duchess, making him a sweet and devoted male lead.

Rose Brumayer is the main villain and Larit's half-sister. Although she possesses the status of a noble lady and a beautiful appearance, she has an arrogant and selfish personality and has abused and tormented Larit, the illegitimate child, for a long time. She feels no guilt even after pushing the misfortune she tried to avoid onto Larit, and she constantly interferes because she cannot stand to see Larit become happy. Consumed by jealousy and inferiority, she is a character who eventually walks the path of ruin, serving as a villain who stands in stark contrast to Larit.

Count Brumayer is the father of Larit and Rose and the head of the Brumayer family. He is an authoritative and cold-hearted character who did not recognize Larit, his illegitimate daughter, as his child and stood by during her long-term abuse and discrimination. He is a selfish person who went as far as sending Larit to marry into a ducal family branded as traitors for the sake of the family's interests and property. He excessively favors Rose and overlooks her faults, but his greed and heartlessness eventually lead to the downfall of his family. He is depicted as one of the core causes of Larit's unhappy childhood.

Crown Prince Rupert is the Crown Prince of the Empire and the next heir to the throne. He is intelligent and has a great political sense; while he appears relaxed and kind on the outside, he judges situations coldly on the inside. He plays an important role in uncovering the truth behind the Reinhardt treason case and moves to stabilize the empire by opposing corrupt imperial forces. He is a character who values responsibility over the desire for power and is evaluated as a Crown Prince with the qualities of a righteous ruler.

The Empress is a character with a strong obsession and ambition for power. She stops at nothing to maintain her position and influence, plotting to eliminate political rivals. In particular, she views Reinhardt, the hero of the empire, as a threat and tries to ruin him by framing him for treason. She acts like a dignified and benevolent mistress of the imperial family on the outside, but in reality, she is cold, calculating, and completely indifferent to the sacrifices of others. Although she possesses excellent political sense and influence, she is a typical Machiavellian villain who eventually moves toward destruction due to her endless greed and desire for power.