There might be characters that represent different aspects of society. For example, some characters could be white people who display various attitudes towards the protagonist when he is in his 'black' guise, such as prejudice or unexpected kindness. And of course, there may be black characters who interact with the protagonist and help him understand the black experience more deeply.
I'm not entirely sure without more context, but likely there is the protagonist who undergoes the transformation to experience life as a black person.
In the 'dead like me novel', the main characters are likely to be those who are dead but still have some form of consciousness or role to play. They could be individuals from different walks of life, brought together by their new state of being. Maybe there's a character who was a young adult when they died and is now struggling to understand what has happened to them. Another could be an older person who has a different perspective on death and the afterlife.
I'm not sure as I haven't read the book. But typically in a novel, the main characters are the ones around whom the story revolves. They are likely to be the ones whose actions and decisions drive the plot forward.
The main characters might include the girl who is the focus of the 'girls like me' concept. There could also be her friends or family members. Her friends might be of different personalities and backgrounds, which would add to the complexity of the story. And her family members could play important roles in shaping her life, like a strict mother or a supportive father. There might also be a love interest, a boy who enters her life and changes things in some way.
In many novels, the main character in 'Someone Like Me Novel' could be an ordinary person with some unique qualities or problems. There might be a mentor - like figure who helps the main character in their quest to find someone like them. And of course, there could be other characters in the background that add to the setting and atmosphere of the story, such as neighbors or colleagues.
The machine itself is also a main character. It has its own thoughts and feelings, which are complex and often unpredictable. It interacts with the human characters in unique ways.
One of the main themes is racial discrimination. The author likely uses his experience in the story to show how black people are treated differently in society.
I'm sorry, I don't know as I haven't read the 'Black Monday Novel'. There could be businessmen if it's related to a financial Black Monday, or just ordinary people trying to survive a difficult day.
Not having read the 'Beyond Black' novel, it's difficult to say exactly who the main characters are. However, in a story that seems to deal with the concept of 'beyond' and 'black' (which might imply mystery or the supernatural), we might expect to find a character who is haunted by something from the other side. This character could be a young person, perhaps in their twenties or thirties, who is trying to make sense of their experiences. There might also be a sidekick - type character, someone who is more practical and tries to ground the haunted character. And then there could be an antagonist of sorts, a force or entity from the 'beyond' that is causing trouble or standing in the way of the protagonist's journey towards understanding or peace.
I'm not sure specifically as I haven't read the 'black ice novel'. But generally, the main characters are often the ones driving the plot forward, facing the major conflicts and challenges in the story.