I don't know for sure, but it's likely the king himself is a main character. There could also be some advisors or nobles who play important roles, either supporting or opposing the king.
I'm not sure specifically as I haven't read it. But generally, a 'fanfic' like this might be about a king who is not desired by his people. It could explore the reasons behind this lack of popularity, perhaps his cruel rule, or some political missteps he has made.
I don't know for sure since I haven't read it. But it could have a main character who is the 'nobody' the title refers to. There might also be supporting characters like friends or foes that this 'nobody' interacts with during the story.
I'm not sure specifically without reading the novel. But usually, there's a central character who drives the story. It could be a young person trying to make their way in the world.
There might also be characters like his advisors. They would play an important role in helping Brian make decisions and rule the kingdom. Their personalities could range from wise and old - school to young and innovative.
Well, the obvious main character would be the colosseum king himself. He would be central to the plot, making decisions about the events in the colosseum. Besides him, there could be strong gladiators who are fan favorites and might have a role in the political or social aspects of the story. And there could be a character who is an opponent to the king, either politically or in the context of the colosseum events, like a rival noble who wants to take over the control of the colosseum and undermine the king.
Obviously, Harry is a main character as the title suggests. There might also be his advisors, who could play important roles in guiding him as a king. And perhaps a rival king or noble who tries to undermine Harry.
Obviously Naruto is one of the main characters since it's in the title 'naruto is king fanfic'. He is likely to be the central figure around which the story revolves.
There's no way to know for definite without more details about the story. However, it might be a solitary character, like a curious neighbor who stumbles upon the 'nobody's home game'. Or perhaps it could be a group of friends who decide to have an adventure in an unoccupied home and end up in the middle of this strange game.
Since I haven't read the 'nobody knows my name novel', it's hard to say for certain. However, based on the title, the main character is likely someone who feels unknown. There may be supporting characters like a friend or a foe. The friend could be someone who tries to help the main character gain recognition, and the foe could be someone who takes advantage of their anonymity.
As I haven't had the chance to read 'nobody's fool graphic novel', it's difficult to name the main characters precisely. However, based on the title, one can assume that there is a lead character who is shrewd and not easily influenced. This character could be of any age or gender. There might be a group of friends or family members around this character that play important roles in the story, some supporting the character's smart decisions and others challenging them, which in turn helps to develop the character further.