The plot twists are often great in 'villainess level 99 light novel'. Since she's at such a high level, you'd expect her to be in control, but there could be sudden turns where she has to face challenges she didn't anticipate. Also, the relationships in the novel can be very engaging. Whether it's her relationship with the heroes who oppose her or with other villains, there's always drama and intrigue.
I'm not sure specifically what 'Cap deage' means. It could be a very specific term, a misspelling, or something relatively unknown. It might be a proper name, a local term in a certain area or a very niche concept.
The 'villainess level 99 light novel' might have a different take on the concept of villainy. Instead of just pure evil, the villainess at level 99 could have her own motives and backstory that make her actions more complex. Maybe she's not just out to cause chaos, but has a grander plan that is unique compared to other villain - themed novels.
The cap man and monkey story is an interesting one. There was this cap man who was traveling around selling his caps. He reached a place near a forest and decided to take a rest under a tree. While he was sleeping, the monkeys in the tree noticed the caps. They climbed down, grabbed the caps, and went back up the tree. When the man woke up, he was confused at first, then saw the monkeys with his caps. He was worried as those caps were his livelihood. But then he remembered that monkeys often mimic human actions. So he took off his own cap and tossed it. The monkeys, being the imitators they are, did the same with the caps they had taken, and the cap man got his caps back.
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 common theme could be loyalty. Given the nature of the character, stories might explore his loyalty to his friends or family. Another could be adventure, as he might be involved in exciting escapades.
The Red Cap Girl story is one that many of us grew up with. It typically begins with the girl preparing to visit her sick grandmother. She puts on her red cap and heads into the forest. The wolf, seeing her, decides to deceive her. He asks her where she's going and she innocently tells him. Then he races ahead to the grandmother's house. The story is rich in themes such as innocence, danger, and deception. It has been adapted into various forms, like plays and movies, to keep this classic story alive.