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 kings themselves are likely to be main characters. They are the ones in power and their actions and decisions shape the events in the stories.
I'm not sure specifically as I haven't read it. But usually, in such collections, there could be a diverse range of characters like a young person trying to find their way in the world.
Since I don't know much about this 'kk anime seven kings stories', I can't say for sure who the main characters are. But I assume the seven kings would be among the main characters.
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.
In a possible '2 kings story', apart from the two kings, there might be a brave knight who serves one of the kings. This knight could be the key to winning battles or resolving disputes between the two kings. And there could be a wise old man who gives advice to the kings, guiding their decisions.
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.
The main elements are the Three Wise Men, the star they followed, and the gifts they brought. They were guided by the star to find Jesus, and their gifts were very symbolic.
Since I don't know the specific 'March of the Kings Story', it's hard to say. But likely the kings themselves are main characters. There might also be their advisers, generals, or even some kind of magical or mythical beings if it has a fantastical element.
I'm not sure specifically as it depends on the novel. But it could be the gods themselves, like Zeus if it's a Greek - inspired story, and the kings who rule the mortal kingdoms, perhaps a heroic king like Arthur if it has some Arthurian elements.
One of the main characters is Eggsy. He is a key figure in the Kingsman agency.