The main character is the villainess, no doubt. However, there could be a mentor - like figure in the novel. This person could be guiding her, either towards more darkness or towards the light. And there may be friends or allies that she meets along the way. These characters would add depth to the story and her journey through her dark side.
One of the main themes could be redemption. The villainess might strive to overcome her 'dark side' and find a new path. Another theme could be power struggle, as she may be dealing with others who oppose her in her journey.
The villainess herself is a main character. Her character development from being a typical villainess in the original concept to something more complex is a central focus.
One interesting plot point is the development of the side characters. They often have their own unique stories and relationships that add depth to the overall narrative.
The Reborn Idler was a novel about a person who accidentally transmigrated to ancient times and became an idle person. However, in this ancient society, he unexpectedly obtained many opportunities to become a useful person.
Extras referred to the extra chapters of the novel, usually used to supplement the plot or pave the way for the ending of the novel. Whether or not the Reborn Idler had any side effects would depend on the specific novel version.
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 recommend the book, Poison Concubine is Hard to Find, Cold King's Heart-hooked Entanglement, to you. Torturing dogs and bitches is absolutely enjoyable! However, this book is different from the book mentioned in the question. If you still need more information about the hard-to-find story of the Reborn Lady, I suggest you look for it through other channels or try to contact the publishing house to obtain relevant information. I hope you like my recommendation. Muah ~
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.