I don't know as I haven't read the novel. It could be a male protagonist who is the central figure in the story.
Since I don't have the details of this particular 'Caught by the Villain' novel, generally speaking, the main character is the one who is caught, let's call them the hero. The villain is another main character. There could be other important characters like a mentor figure who might have given the hero some skills or knowledge before they got caught, or a fellow captive who teams up with the hero to escape from the villain.
In some 'caught short stories', the main character could be an adventurer. Let's say in a story about being caught short of supplies during a jungle exploration. This adventurer has to face all kinds of challenges without the proper equipment. They are the focus of the story as they struggle and find ways to survive.
I don't have enough information to tell who the main characters are in 'caught in the heartbeat fanfic' as I haven't read it. It could be characters from the original work that the fanfic is based on.
I don't know for sure as I haven't read it. But in 'Twilight' - related fanfiction, it's likely that Bella, Edward, and Jacob could be main characters. They are the central figures in the original 'Twilight' series, so it's very possible they play important roles in this fanfiction as well.
As I don't know the specific 'Caught 2015' work, it's difficult to say who the main characters are. But if it's about a crime, the main characters could be the criminal, the detective or police officer who caught them.
Obviously, the main characters are the boy and his grandmother.
Well, without having read the novel 'Caught in Time', it might be a story that revolves around time - like someone being trapped in a certain time period, either literally or metaphorically. For example, it could be about a person who is stuck reliving a day over and over, or a character who is held captive by memories from a specific time in their past. It could also be a time - travel - related story where the protagonist gets caught in a different era and has to find a way to get back to their own time.
Based on just the title, the only obvious main character is the boy. However, depending on the nature of the story, there might be other important characters. For example, if it's a story set at the beach and the boy is caught by a lifeguard while wearing the shiny bikini, then the lifeguard would be another main character. Or if it's a story about a fashion show gone wrong and the boy is caught by the show organizers, they would be significant characters too.
The main character is likely the one in the embarrassing situation. They are at the center of the story as it's about their action and the aftermath. The mom is also crucial as she is the one who caught the act. Depending on the story, there could be friends of the main character who are either aware of the situation or become involved later on.
The 'Caught in Time Novel' might revolve around a story where the concept of time plays a crucial role. It could be a time - travel story, where the protagonist is caught in different eras and has to navigate through various challenges. Or it could be about a person who is stuck in a repeating cycle of time, constantly reliving a certain period until they figure out how to break free.