Not having read the novel, we can only guess. There could be a protagonist who is drawn to the mystery of the moon. Maybe there are also some supporting characters like an old wise man who imparts knowledge about the moon's significance in the story, or a group of friends who accompany the main character on their moon - related adventures.
Since I haven't read the 'Secret Moon Light Novel', it's hard to say. But it could have characters like a young protagonist who is drawn to the mystery of the moon. There might also be an older mentor - type figure who helps the protagonist understand the secrets related to the moon in the story.
There's no way to be certain about the main characters without reading the novel. But it's common in such novels that the main character has some sort of unique quality. In this case, perhaps a character with the ability to communicate with the star and moon or someone who has a prophetic dream about the star and moon. There could also be antagonists who try to stop the main character from achieving whatever they are chasing related to the star and moon. Maybe a dark sorcerer who wants to use the power of the star and moon for evil purposes and sees the main character as a threat.
The main character, of course, is a key figure in 'Reaper of Drifting Moon' light novel. There might also be a mentor - like figure who helps him on his journey, guiding him through the complex world of martial arts and politics. And there could be an antagonist, a powerful figure who stands in the way of the protagonist's goals.
Typically in such a light novel, there would be a protagonist who is on a journey of self - discovery and power - seeking. There might also be a mentor - like figure who guides the protagonist in the world of martial arts. And of course, there will be antagonists who oppose the protagonist's goals and actions, but without having read it thoroughly, I can't name specific characters.
It could be that there is a young and adventurous character in 'fly me to the moon light novel'. This character might be on a quest of some sort, and along the way, meets other important characters like a wise old mentor who gives guidance. There may also be an antagonist who tries to stop the main character from achieving their goals.
The main character is surely the legendary moon light sculptor. There may be other characters such as his assistants in the studio, if he has one. There could also be collectors who are interested in his sculptures, and some characters from the art community who either support or oppose his unique style. Additionally, there might be characters from his past, like family members or old friends, who have influenced his development as an artist.
In the 'Sword Art Online Moon Cradle' light novel, Kirito is one of the main characters. He is a skilled player and his actions and decisions drive much of the story forward. Asuna is also a key figure. Her relationship with Kirito and her own abilities contribute to the plot. There are also other supporting characters that interact with them, like some of the new players they meet in the virtual world. These characters together create a complex web of relationships and storylines within the novel.
I'm not sure who the main characters in the Moon Palace Novel are as I haven't read it. But they could be a brave hero and a beautiful heroine.
Not having read the 'killing moon novel', I can only speculate. There might be a protagonist who has a special connection to the moon, either through some sort of power or heritage. There could also be antagonists who are either causing the moon to be 'killing' or are taking advantage of the chaos it creates. And perhaps there are supporting characters like friends or mentors who help the main character on their journey to deal with the situation regarding the killing moon.
Often, there is a lead scientist. This person is highly intelligent and is in charge of most of the research on the moon base. They are the one who makes important decisions regarding scientific experiments.