One of the main themes is probably self - discovery. The protagonist, as the villainess daughter, likely has to figure out her own identity and role in the story's world. Another theme could be redemption or breaking free from the pre - set 'villainess' path.
The main character as the villainess daughter is likely to be in a difficult position. She has to face the judgment of society and those around her. She may possess some unique skills or talents that are either overlooked or misconstrued because of her 'villainess' status. For example, if she is good at magic, others might suspect her of using it for evil purposes. Her relationships with other characters, whether it's friendship, rivalry or love, are all influenced by her position as the villainess daughter. And these relationships in turn shape who she becomes throughout the story.
The protagonist, the villainess daughter herself, is likely one of the most interesting. Her internal conflict between her family's reputation and her own desires makes her complex. Also, any characters who oppose her initially but then come to see her in a different light could be interesting.
One of the virtues could be her intelligence. In many villainess novels, the so - called villainess is often very smart. She is able to outwit those around her, even if her actions are sometimes misinterpreted as villainous. Another virtue might be her determination. Despite facing various difficulties and the negative perception of others, she continues to strive for her goals.
They are also presented in contrast to other characters. While the other characters may be weak - willed or overly dependent, the villainess with her virtues stands out. Her independence, for instance, becomes more obvious when compared to those who constantly seek help. Her loyalty, even if misplaced at first, makes her character more complex and interesting as it evolves throughout the story.
There could be her family members like her parents. They might play important roles in the story, either supporting or opposing her at different times.