We can only make assumptions without more information. Komoiji is probably a main character. There could be side characters like a mentor figure who tries to understand or help Komoiji if they are indeed a'madman'. Or there might be a rival character who challenges Komoiji in some way, perhaps due to their 'madman' - like behavior. It all depends on the nature and plot of the visual novel.
I'm not sure specifically as there could be many different stories in a visual novel like this. It might involve complex characters, unique settings, and a particular plot that could range from mystery to drama or something else entirely.
The main characters are, as the title suggests, the professor and the madman.
The main characters are the professor and the madman. The professor might be a figure of knowledge, perhaps an academic in a certain field. The madman could be someone with a mental disorder or an eccentric character. Their stories might cross paths in an interesting way, like the professor might be interested in the madman's unique way of thinking or the madman might have some knowledge or experience that the professor finds valuable.
Obviously, the two main characters are the professor and the madman. The professor is likely an academic figure, involved in some sort of intellectual pursuit. The madman, on the other hand, is someone with mental issues but still has a role to play in the story, perhaps having some unique qualities that draw the professor's attention.
Since I don't have specific information about this '999 visual novel', I can't tell you exactly who the main characters are. But usually in a visual novel, there are protagonists who drive the story forward, and there might be supporting characters like friends, family members, or antagonists who create conflict.
Since we don't know the details of '86 visual novel', we can't say for sure who the main characters are. They could be ordinary people living in a fictional world, or they could be heroes with special abilities. It all depends on the nature of the story which we don't know yet.
I'm not sure specifically what 'madman visual novel' is about as there could be many different visual novels with that name or something similar. It could be about the story of a madman, perhaps his psychological state, his actions, and how they impact the world around him in the context of the visual novel's story.
The main characters are the professor and the madman, of course. Their relationship and their contributions are central to the story.
The main characters are the professor and the madman, of course. The professor is likely someone with a passion for knowledge and a drive to create a great work, like a dictionary. The madman, despite his condition, has a remarkable intellect that the professor comes to rely on.
I'm not entirely sure as there could be multiple main characters depending on the specific story of the Sandman Visual Novel. But often, there would be a character who serves as the protagonist, someone who has a unique ability related to the dream world.