In many novels with such a premise, the 'rival' often has his own motives and backstories that lead to this situation. For example, he might have been wronged in the past and sees the hero as an obstacle to his revenge or to achieving his goals. The plot could also explore how the two characters grow and change through their rivalry, and whether they will eventually reach some sort of understanding or remain enemies.
I'm not entirely sure about this novel in particular. But often in this type of story, the 'rival' character has their own backstory that led them to become the hero's adversary. It could be that they come from a different background, like a poor upbringing while the hero is from a privileged one. This disparity might fuel their rivalry, and as the story progresses, they might either find a way to reconcile or the rivalry could escalate to a point of no return.
There could also be other supporting characters. Maybe there is a love interest that both the hero and the rival are vying for. Or there could be a mentor figure who has influenced either the hero or the rival. Another possibility is that there are sidekicks for each of them, who play important roles in their respective quests and in the rivalry between the two main characters.
Since I haven't read the novel, it's hard to say for sure. But surely there's the main character who has become the hero's rival. And of course, the hero. There may also be side characters like friends or family of either the rival or the hero who play important roles in the story.
I'm not sure specifically as I haven't read this exact novel. But generally, it might be about a character who somehow becomes a rival to the heroes in the story. Maybe there are conflicts over power, love, or some noble goals.
In this 'I have become the heroes rival novel', the main characters are probably the titular character who has become the rival. They must have some unique traits that set them apart from the heroes. And the heroes, who are likely to have the common heroic qualities like courage, justice - they are the ones against whom the rival is pitted. There might also be some supporting characters who are either on the side of the rival or the heroes, influencing the conflict and the overall story.
I recommend the novel " Endless Love, Declaring War on the Male Rival Friend " to you. The male lead's love rival suddenly changed from many female fans and girlfriends to a man. In order to get back the man, the female protagonist did not hesitate to do everything she could. She was stuck in traffic, swimming, pretending to be her ex-girlfriend, etc. The male protagonist whispered to her,"Baby, you are really..." "
[I Became the Villain's Daughter] was a modern romance novel written by Qu Xiaoxi. This novel was about a little princess of the Koi tribe who was reincarnated as Lu Li in order to change the tragic ending of the villain, Lu Junhan. In the story, the little dumpling Lu Li was determined to protect his father and not let anyone bully him. However, the information about the free full-text was not mentioned in the search results, so it was impossible to draw a conclusion whether the full-text was free or not.
The following are some recommended novels, in which the heroine transmigrated into the villain's daughter and saved the villain's plot:
1. [The Villain's Mother's Koi Daily Life: Traversing the Book]: The female protagonist, Fang Jinxi, transmigrated into a novel and discovered that her son was the future villain, while her daughter was the biggest koi in the book. In order to prevent her son from walking down the path of villains, she decided to raise them well and embark on the path of business in the 1990s, eventually reaching the peak of her life.
2. [Dressed as the Villain's Mother]: The female protagonist transmigrated to become the mother of the villain's supporting male character. In order to save her son, she started a story with the self-made CEO male protagonist. This was a 1v1 novel.
3. "Saving the Villain (Transdimensional Book)": The female protagonist transmigrated to a story world. She must accept a mission to save the villain in order to return to the real world. In this world, she worked hard to save the male lead and help him defeat the original male and female leads to achieve hegemony.
These novels all had the plot of transmigrating into the villain's daughter and saving the villain, which included elements such as family, love, and growth. Reading these novels allowed one to experience the adventures and growth of the heroine in different worlds, and at the same time, one could feel the warmth of family and kinship.