I don't really know for sure, but it could have a main character who is the black magician himself. Maybe there's also a mentor figure who guides him in his magical journey, whether it's for good or bad.
Well, in a 'black magician novel', the main character is obviously the black magician. He could be a complex character with a troubled past that led him to practice black magic. There might be a love interest, someone who tries to redeem the black magician from his dark path. And of course, there could be rival magicians or those who are in charge of maintaining order in the magical world and see the black magician as a threat.
In 'omni magician light novel', the main character is likely the omni - magician. There could be supporting characters like friends or comrades who join the magician in their adventures. Maybe there's an antagonist, perhaps another powerful magic user who is jealous of the omni - magician's abilities or has some evil plan that the magician has to stop. There could also be characters from different magical races that interact with the main character throughout the story.
Since I don't know the details of the 'Magician of Black Chaos Story', the main character is likely the Magician of Black Chaos. But there may also be other characters like his opponents or his sidekicks.
I'm not entirely sure without more specific information about the particular 'Magician's Academy' light novel. But usually, there would be a group of students, perhaps a young and talented protagonist who stands out among his or her peers, and there might be a strict but wise teacher or mentor figure.
I don't know specifically as I haven't read it. But it might have the magician as a main character. There could also be his mentor, who teaches him about magic. And perhaps a sidekick or a love interest who accompanies him on his adventures.
The hero girl and the green magician are the main characters. The hero girl might be a brave and determined character, perhaps with some latent powers. The green magician, on the other hand, is likely to be a character with strong magical abilities related to the color green, which could imply something unique about his magic, like being related to nature or healing magic in some way.
I'm not entirely sure as I haven't read every detail of it, but typically in an isekai story like this, there's a protagonist who is the 'cheat magician'. There may also be side characters like friends or allies they meet in the new world, and perhaps antagonists who oppose them.
I don't know for sure. But perhaps there is the magician himself as the central character. There might also be his sidekick or a magical creature that helps him on his adventures.
In Maugham's 'The Magician', the most prominent character is the magician. He drives the plot with his actions and abilities. There could be characters such as his love interests, if any, who might be both attracted to and repelled by his power. Then there are the onlookers, the people who watch his performances or are aware of his magic in some way. These onlookers can range from the curious commoners to the more sophisticated members of society. Their reactions to the magician and his magic contribute to the overall fabric of the story.
Since we don't have much information about this 'the dark magician novel', it's hard to say exactly. But the title implies that the dark magician is a main character. There could also be characters like his apprentices if he has any, or people who are affected by his dark magic, such as villagers or other magic users who become involved in his story, either by trying to fight him or getting caught in the crossfire of his actions.