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.
Since we don't know the specific 'caught in the heartbeat fanfic', we can only guess. It could be the main protagonists from the source material. For instance, if it's a fanfic based on a TV show about a group of friends, it could be the two friends who end up in a romantic situation which is what the 'caught in the heartbeat' might refer to. Or it could be a hero - villain relationship where the two are caught in an emotional tug - of - war that is symbolized by the 'heartbeat'.
Without reading the 'caught in the heartbeat fanfic', it's really hard to say. But usually in fanfics, the main characters are often the popular ones from the original story. They might be the ones that the author of the fanfic is most interested in exploring further in this new, self - created scenario related to being 'caught in the heartbeat' - whatever that means in the context of the story.
Since it's a fanfic, it depends on the source material it is based on. However, 'caught in the heartbeat' gives the impression of a story centered around strong emotions. It might be about a character who is suddenly plunged into a situation where they have to face their true feelings. For example, in a fantasy setting, a hero might be caught in a situation where they realize their love for a fellow adventurer, and this realization is like a 'heartbeat' that drives the rest of the story, with all the drama, conflict, and resolution that follows.
The main characters in the 'heartbeat love story' could be a pair of soulmates. Maybe it's an artist and a writer. The artist might be inspired by the writer's words, and their encounters cause their heartbeats to race. They could be two people who are trying to find their place in the world while also finding love in each other.
Typically, the main characters from the original work on which the 'in a heartbeat' is based are often the main focus in the fanfiction. However, sometimes new characters can be introduced to add more depth or drama to the story.
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.
The characters in the movie included the female lead, Ayase Haruna, a wife/intellectual mature/harbor for scumbags, the female lead, Terashima Rei, I Hate Him/Cold Lemon, and the female lead, Tsukishima Miwa, Shimako/I Am Very Stern. "Mrs. Ayase's Heartthrob" by Chen Ling. It's a light novel/daily romance novel with rebirth, system style, daily novels, teachers, students, and love elements. It's finished and can be enjoyed without worry. User recommendation: On the first day of reporting to Terashimakawa University, the new student affairs teacher is actually the lady next door? I hope you will like this book.
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.
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.
The main characters are clearly Flippy and Flaky. Flippy is often known for his dual personality, one being calm and the other being more aggressive, especially in combat - like situations. Flaky is a very timid character, usually nervous and easily scared. In this fanfic, their personalities would play a big role in how they react to being caught in the spider's web.
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.