It could be an ordinary person. In some stories, an ordinary person is given an extraordinary opportunity to go to the moon and back. This person might be the main character as they experience this incredible adventure and learn and grow from it, facing their fears and coming back a changed person.
I'm not sure exactly as the 'to the moon and back story' isn't clearly defined here. But it could be astronauts. Astronauts are common main characters in stories about going to the moon and back. They are the ones who brave the journey into space.
I'm not sure as I haven't read the novel. But usually, there would be a protagonist who embarks on the journey to the moon goddess. There might also be some kind of guide or helper character.
Since I don't know the specific story, it could be a truck driver and his or her lover. The truck driver would be one of the main characters as the truck is involved, and the lover would be the person to whom the 'love you to the moon and back' sentiment is directed.
Since I don't know the exact 'moon man story', I can't say for sure. But it could be the moon man himself as the main character. There might also be other characters like his friends or foes, perhaps astronauts from Earth if it's a story involving Earth - moon interactions.
Typically in a story like Rebel Moon, there would be a heroic figure who leads the rebellion. There might also be a tech - savvy character who helps with things like weapons and communication. And of course, there could be an old and wise mentor - type character who gives advice to the younger rebels.
The main character in 'Goodnight Moon' is a young bunny. This bunny is the focus as it moves around the room, noticing and saying goodnight to different items. There's also an old lady in the story who is whispering 'hush'. While the bunny is clearly the main focus, the old lady adds an element of coziness and the feeling of being taken care of. And then there are the inanimate objects like the moon outside the window, the red balloon, which are all part of the bunny's goodnight routine.
There could be a group of astronauts in the 'man on the moon 3 story'. For example, Captain Steve, who is an experienced space traveler, and his crewmates like Lisa, a brilliant scientist, and Tom, an expert in spacecraft engineering. They all play important roles in this third moon - related adventure.
I don't know for sure as we haven't been given much information about the 'dark moon story'. It could be a lone adventurer as the main character.
The main characters are the king, obviously, and the moon, which is personified in some ways in the story.
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.
The girl herself is a main character as the whole story revolves around her. And probably the moon can be considered as another important 'character' in a sense, as it is the source of the magic she drinks.