I don't know as I haven't read the story. But they could be ordinary people with extraordinary destinies.
Without having read 'the stars between us story', it's hard to say. However, they might be characters like an astronomer who is passionate about the stars and discovers something unusual that changes his life. And perhaps a young girl who has always been fascinated by the night sky and somehow gets involved in a big adventure related to the stars. There could also be a wise old man who holds the key to some ancient knowledge about the stars.
Since I have no knowledge of this particular story, the main characters could be a group of astronauts on a mission to explore a distant star. They might face various challenges during their journey and form deep bonds with each other. Another possible main character could be a stargazer on a remote planet who observes strange phenomena among the stars and sets out to find the truth, and along the way meets other characters who are also drawn to the mystery of the stars.
I don't know the 'in the stars story' well enough to say who the main characters are. It could be a young girl who has a special connection to the stars.
Some of the main characters include Anzu, who plays an important role in the idol world of the story. Then there's Trickstar's members like Hokuto Hidaka, Subaru Akehoshi, etc. They are key players in the story's idol - related events.
Without further information about the 'stars at noon story', it's impossible to determine the main characters. However, it could be a story about a young child who is the only one able to see the stars at noon and has to convince the adults around them that it's real. Or perhaps it's a story about a group of villagers who experience a strange omen in the form of stars at noon and have to figure out what it means together.
The main characters in the Alchemy Stars story are quite diverse. There's a young and brave protagonist who is on a quest to uncover the truth about the world and the powers within it. There are also some mentor - like characters who guide the protagonist along the way. Each character has their own personality traits, like some being more impulsive while others are more cautious. Their interactions shape the story as they face challenges, make decisions, and strive to protect their world from the encroaching darkness.
Not having read the'sing to the stars story', it's all speculation. It could be that the main character is a child. Children are often full of wonder and imagination. This child might believe that the stars are listening to their songs. And there could be a magical creature in the story, like a star - fairy or something, who is attracted by the child's singing and becomes part of the story.
The main characters are likely the Sailor Guardians like Sailor Moon, Sailor Mercury, Sailor Mars, etc.
In the 'the moon and the stars story', the moon is a central character. It could be a wise, old moon that has seen many things. The stars are also main characters, perhaps some are brave little stars, while others are shy. They all interact with the moon in different ways, like the moon might be a protector of the stars, or the stars might be the moon's little helpers in some grand celestial plan.
Since we don't have much information, it's difficult to say for sure. But it could be the lost stars themselves.
It depends on the specific version of the legend. It could be the stars themselves as characters. For example, a bright star might be a heroic figure, leading the other stars in a celestial dance.
Perhaps a magical being, like a mermaid or a selkie, is one of the main characters in the Sea of Stars story. This being has lived in the sea for a long time and knows some of the secrets of the Sea of Stars. And there could be a brave warrior who protects the group as they explore the strange and wonderful sea.
Since I don't know the exact 'lost in the stars story', I can't say for sure. But it could be an astronaut, a stargazer, or some sort of space traveler.