In 'the king's man story', there could be a lead agent who is highly skilled in combat and espionage. There might also be a mentor - like figure who has years of experience in the spy business. And of course, there will probably be some younger recruits who are eager to prove themselves and bring fresh perspectives to the group.
I'm not entirely sure as I haven't studied it in great detail, but there are likely to be some brave spies and a leader who guides them in 'the king's man story'.
There is Conrad, for one. He's a key character in the King's Man story.
In 'Surrender the King's Story', the king is the central figure. However, other important characters could be the king's loyal servants who might try to persuade him otherwise or help him during the process of surrender. There could also be representatives from the opposing side who come to negotiate the terms of surrender. These characters would interact with the king and influence the outcome of the story.
It's difficult to determine without more information. But perhaps, aside from the king, there is a young and heroic knight who the king's decision affects greatly. Maybe the king has to decide whether to send this knight on a dangerous quest or keep him at court.
The main characters are the king and the wise man who proposed the chessboard - grain doubling idea.
The king is surely one of the main characters. If it's a story about his romantic love, then his beloved would be another important character. But if it's about his love for the kingdom, then his advisors, the knights who help him protect the land, and the common people could all be considered main characters in the story as they are all part of what he has an affection for.
Since I don't know the specific 'the king's bed story', it's hard to say. But likely, the king himself would be a main character. There could also be servants who take care of the bed and the king's chambers.
The king, of course, is likely to be a main character. There might also be his advisers, as they would play a role in influencing his choice.
Since I don't know the exact 'the king's highway story', I can't say for sure who the main characters are. They could be the king himself, some of his loyal subjects like knights or merchants, or perhaps commoners who have an important role in the events on the highway.
The king's daughter is the central figure in the story. Alongside her, there may be her mother, the queen, who might offer advice or protection. There could be a wise old man in the court who has knowledge of ancient magic or prophecies and helps the king's daughter. Also, there could be a group of rebels within the kingdom who initially oppose the king's daughter but later come to see her as their savior. And don't forget about the creatures in the enchanted forest that she might encounter during her adventures, such as talking animals or magical spirits.
Since we don't know the exact story, the main characters are likely to be the king and the bird. There might also be other characters like the king's servants who interact with the bird or people in the kingdom who are affected by the bird's actions.