Well, obviously the main character is the one who adopts the villainous dad. This person is likely to be a kind - hearted individual with a strong sense of justice or perhaps a big heart for wanting to help someone as difficult as a villainous dad.
One interesting plot could be the initial struggle of the main character to deal with the villainous nature of the adopted dad. For example, they might have to constantly prevent him from doing evil deeds while also trying to understand his past that led him to be this way.
The plot likely involves a villainess who is facing a terminal illness and decides to reject the offer of being adopted, perhaps to maintain her independence or for some other compelling reason.
The main character is obviously the one who adopts the villainous dad. This character is often portrayed as kind - hearted and brave, willing to take on the challenge of having a villainous figure as a family member.
Another possible plot is that the main character discovers some secrets about the villainous dad's past that led him to be the way he is. This could lead to a journey of understanding and forgiveness, and also put the main character in difficult moral dilemmas as they try to balance their loyalty to their adopted dad with what is right and wrong.
A common trait is also being manipulative. The villainess will try to manipulate the situations and the people around her to get what she wants. She might manipulate the male leads by lying about the protagonist or creating misunderstandings between them to drive a wedge in their relationship.
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.
I think 'though i am an inept villainess novel' is quite interesting. It often takes a fresh perspective on the villainess trope. Instead of the typical all - powerful and evil villainess, this type of novel focuses on one who is inept, which can lead to some really humorous and unexpected plot twists.