There could be Martian explorers. They might be the ones who discover the existence of the sea kings of Mars and get involved in the otherworldly events.
The sea kings of Mars might be fictional entities. In such stories, they could be powerful rulers of some sort of Martian seas (if we assume Mars had or has seas in a fictional sense). Otherworldly stories could include various elements like strange creatures, different forms of life, and unique landscapes that are not of our Earth.
There could be a young and inexperienced soldier who grows and matures throughout the stories. He starts out scared but becomes a brave warrior through his experiences in the Mars war. For example, he might face his first real combat situation and learn to overcome his fears and fight bravely.
Since it's a Naruto - based fanfiction set on Mars, Naruto is likely to be one of the main characters. There may also be other characters from the Naruto series who accompany him to Mars, like Sasuke or Sakura.
I don't know the exact main characters since I haven't read the novel. It could be astronauts or scientists.
One of the main characters is Nadia Cherneshevsky. She is an engineer and plays an important role in the construction and development on Mars. Another main character is Arkady Bogdanov. He is a visionary who has different ideas about how Mars should be developed.
I'm not sure specifically who the main characters are without reading it. But they could be astronauts on a mission to Mars, or perhaps scientists studying the planet.
I'm sorry, I don't know who the main characters are in 'Vernonic Mars novels' as I haven't read them.
The main characters in the Three Kings Stories are the three wise men. They are often named as Caspar, Melchior, and Balthazar, though this varies in different traditions. They were important figures who came from afar, following the star to find the baby Jesus.
The main characters in 'the king's story' depend on the nature of the story. The king is central. If it's a story about political intrigue, his ministers and rivals could be main characters. If it has a religious undertone, the high priest or religious leaders in his kingdom might be main characters. His friends from his youth, if they are still part of his life in the story, could also be important characters. Additionally, if there are any prophecies involved, the seer or the one who foretells the future could be a main character as well.
I'm not entirely sure, but there might be vampire characters as it is related to vampires. Maybe there's a lead vampire who has a unique personality and abilities.