Since it's an anonymous story, it's hard to say exactly. But typically, there would be the knight himself as the main character. There might also be a villain, like an evil sorcerer or a tyrannical lord.
In the old anonymous knight story, the knight is the central figure. He could have a trusty steed as a sort of side character. There may be a love interest, perhaps a fair maiden. And as I mentioned before, there could be an antagonist. If it's a story set in a larger kingdom, there might be the king and other nobles who play important roles in the plot, either helping or hindering the knight's journey.
The main character is surely the knight. But depending on the nature of the story, there could be other important characters. For example, if the knight is part of a knightly order, there could be his comrades in arms. There might be a hermit who provides shelter and wisdom to the knight during his travels. And in a more complex plot, there could be a group of bandits or thieves that the knight has to deal with, each of them having their own personalities and motives within the story.
I'm not sure which specific 'old anonymous knight story' you mean. There are many such stories in different cultures and literatures. Generally, it might involve a knight's adventures like going on a quest, fighting against evil, and protecting the weak.
As I don't know the story, it's difficult to say. But surely the anonymous girl is a main character. There might also be characters like her family members, friends, or people she meets during her journey in the story.
Since I haven't read it, I can't say for sure. But they are probably the two anonymous lovers.
Since I don't know the exact 'knight games story', it could be the knights themselves, like Sir William, a brave and experienced knight. There might also be a young squire who dreams of becoming a knight and follows the main knight throughout the story.
In the 'love knight story', the knight is surely one of the main characters. He would be the protagonist, driving the story forward with his actions in the name of love. His love interest, let's say a fair lady, would also be a main character. She might be the one the knight is trying to protect or win over. Additionally, there could be a mentor figure, an older knight or a wise wizard, who gives advice to the main knight on his journey of love. This character could help the knight navigate through the difficulties and challenges that come his way in the pursuit of love.
In the Dark Knight Story, the most prominent characters are Batman, who is the Dark Knight and protector of Gotham. Then there's the Joker, a deranged and extremely intelligent criminal. Also, Commissioner Gordon plays an important role. He is one of the few in the police force who trusts Batman and often works with him to keep the city safe. These characters drive the story forward with their interactions and their different goals. Batman wants to bring justice, the Joker wants to create anarchy, and Gordon wants to uphold the law in a city filled with corruption and crime.
Since I don't know the exact 'Sad Knight Story', it could have the sad knight as the main character of course. There might also be a damsel in distress he is trying to save or a villain who caused his sadness.
In the Dark Knight story, the most prominent characters are Batman, who is the Dark Knight trying to protect Gotham. Then there's the Joker, a chaotic and evil villain who loves to create mayhem. Also, Harvey Dent is an important character. He starts as a district attorney with good intentions, but later gets corrupted by the Joker's actions.
Probably the little knight himself is a main character. There might also be a mentor figure, like an old knight or a wizard.
The main character is of course the black knight. There may also be other knights he interacts with, like his rivals or allies.