The main character is surely the sad knight. There could be other characters like his fellow knights who might have either abandoned him or been killed. There could also be a wizard or a sorcerer who has some connection to the events that made the knight sad, either as an ally who couldn't help enough or an enemy who cast a curse on him.
In the 'Sad Knight Story', the central figure is the sad knight. There may be side characters such as his squire who has been with him through his trials. There could be a king or lord who once commanded him and whose orders or actions might have led to the knight's current state of sadness. And perhaps there is a mysterious figure, like an old hermit, who gives the knight some advice or a quest that is related to his journey of dealing with his sadness.
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.
There's no way to know for sure without more information. It could be a young child who has to endure a difficult life situation in the sad story. Or it could be an old man looking back on a life full of regrets. Maybe it involves a group of people, like a family or a community that has to deal with a sad event together.
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.
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.
In the Dark Knight story, there are several main characters. Batman is the protagonist, a vigilante protecting Gotham. The Joker is a very important character too. He's a maniacal villain with a twisted sense of humor. Then there's Harvey Dent. He starts out as a good guy, a district attorney trying to clean up Gotham, but later becomes Two - Face. These three characters play crucial roles in the story.
The knight is surely one of the main characters. In addition, there might be his squire, a young boy who helps him with his armor and horses. There could be a wise old wizard who gives the knight advice. And perhaps a beautiful princess who is the object of the knight's affections or the one he is sworn to protect.
Again, without more details, it's hard to say. But it could be the knight himself as the main character, and perhaps a princess he is trying to save.