The main character is surely the kind king. Besides, there could be some advisors around him. They might either support his kind deeds or try to persuade him to be more practical at times. And then, there might be some ordinary people in the kingdom, like farmers or artisans, whose lives are affected by the king's kindness.
In 'the kind king story', the most prominent character is the kind king himself. There may be some villains as well, who oppose the king's kind policies because they think it will make the people soft and difficult to control. But in the end, the king's kindness prevails, and those villains are defeated. There may also be some foreign envoys who are surprised by the king's kindness when they visit the kingdom.
Obviously, the kind - hearted king is a main character. There might also be his advisers who help him make good decisions for the kingdom. And of course, the common people in the kingdom, like the farmers, the artisans, etc., are important as they are the ones the king is trying to help.
Since I don't know the exact 'be the king story', I can't say for sure. But generally, there could be the protagonist who aims to be the king. There might also be a mentor figure who guides him, perhaps an old wise man or a battle - hardened general. And of course, there could be antagonists like rival claimants to the throne or power - hungry nobles who oppose the protagonist's rise to kingship.
There would likely be a queen. She could be a supportive partner or a scheming figure. For instance, in some stories, the queen helps the king rule justly, while in others, she tries to gain power for herself.
The main character is King Arthur himself. Then there is Merlin, the powerful wizard who aids Arthur. Guinevere, Arthur's queen, is also a significant character. And of course, there are the Knights of the Round Table like Lancelot.
I'm not familiar with the somanadri king story, so I can't accurately name the main characters. But thinking about typical king - related stories, in addition to the king, there might be loyal knights who serve him, wise sages who offer counsel, a beautiful princess who could be part of a political or romantic plot, and perhaps traitors within his own court who try to undermine his rule. Without knowing the specific details of this story, this is just speculation.
One of the main characters is Nanisca. She is a powerful Agojie leader. Another important character is Nawi, a young woman who becomes part of the Agojie. King Ghezo also plays a significant role as the ruler of Dahomey in the story.
Some of the main characters in the Copper King story include F. Augustus Heinze. He was known for his aggressive business tactics in the copper mining business. And, as mentioned before, Marcus Daly and William Clark, who were very influential in the development and control of copper mines, and their actions shaped the industry and the areas around the mines.
Since we don't know the exact 'maiden king story', it's difficult to say for sure. But likely, the maiden king herself is a main character. There might also be advisers or enemies who try to oppose her rule.
As I don't know the details of this 'little king story', it's hard to say exactly. But surely there would be the little king himself. There might also be his advisers, some loyal subjects, and perhaps villains who oppose the little king's rule.
In the 'King and I' story, there's Anna, a smart and independent Englishwoman. She's hired to educate the King's children. Then there's the King of Siam, who is initially quite autocratic but also has a sense of curiosity about the Western ways that Anna represents. There are also the King's many children who play important roles in the story as they are the ones being taught by Anna.