Since we don't have more context, it could be the twins themselves. They are likely to be the central figures around which the story revolves.
The main characters in 'twin fantasy story' may well be the twins. However, depending on the nature of the story, it could also include their family members if the fantasy is related to their family heritage. For instance, their parents might have been part of a prophecy that the twins are now fulfilling. Or it could be friends they make along the way in their fantasy adventures, such as a brave knight or a clever thief who join them in their quest and become important characters in the overall narrative.
The main characters in a 'twin fantasy story' are probably the twins, of course. But there could also be other supporting characters like a wise old wizard who guides them on their journey, or a mischievous fairy who either helps or hinders them. There might be an antagonist as well, perhaps a dark sorcerer who wants to use the twins' special powers for his own evil purposes.
I don't know for sure, but I assume the two twin stars are the main characters.
Since it's a 'children twin story', the main characters are likely the twin children themselves.
The main characters would be the twins without a doubt. However, depending on the nature of the story, there could be other important characters. Maybe there's a friend or a teacher who witnesses the twins' sad situation and tries to help but fails. Or perhaps there's an antagonist, like a bully who targets the twins because they are different from others, which adds to the sadness in the story.
In the 'little twin star story', the principal characters are the two twin stars. They are the heart of the narrative. These two celestial entities are not just ordinary stars. They are twin stars, which implies a special connection between them. Their relationship could be one of mutual support and exploration. They might encounter various other astral phenomena during their adventures, but it is their bond that drives the story forward. They are like two siblings in the cosmos, sharing a unique connection that makes them stand out in the story.
The main characters in 'little twin stars story' are the little twin stars. These two characters are the heart of the story. They are the ones who go on adventures, meet other characters in their starry world, and create the overall charm of the story. Their unique relationship as twins and their individual personalities drive the plot forward as they interact with their surroundings and the other elements in their celestial home.
I don't know for sure as I haven't read this 'twin novel'. But they could be the twins themselves, and perhaps their parents or friends who play important roles in their lives.
I don't know the exact main characters as I'm not familiar with this specific 'twin branches high school story'. But they could be students, teachers, or even the principal.
Well, of course, the twin dragons themselves are likely to be the main characters. They might have names like Zephyr and Nova. Zephyr could be the more impulsive one, always ready to take action, while Nova is the more cautious and thoughtful twin.
As I'm not familiar with this 'twin sword novel', it could have a main character who is a skilled swordsman or swordswoman. There might also be a mentor - like figure who guides the protagonist in their journey related to the twin swords. And there could be an antagonist who wants to get the twin swords for their own evil purposes.
I don't know as I haven't read this 'twin stars novel'. There could be all sorts of main characters. Maybe it has a male and a female lead who are the 'twin stars' in a metaphorical sense.