I don't have the exact information. But it could be the person who discovers the ghost on the rooftop as one of the main characters. There might also be other characters like people living in the building who are affected by the presence of the ghost.
Not having read the novel, the main characters could be a group of friends. They might gather on the rooftop regularly, and each of them could bring different personalities and stories to the plot. Maybe there's a leader among them who drives the action that takes place on the rooftop.
I'm not sure specifically as I haven't played it. But generally, a visual novel about a ghost on the rooftop might be about a story where the main character encounters a ghost on a rooftop. It could involve mystery, horror, or perhaps a more emotional story of the ghost's past.
I don't know as I haven't read it. There could be a young protagonist who spends a lot of time on the rooftop.
I don't know the specific main characters as I haven't played or read it. But they could be a person haunted by the ghost and someone who tries to help them deal with the situation.
I don't know as I haven't read it. There could be a character who discovers the letter ghost, perhaps a young person who is curious and brave.
I have no specific information about the 'a3 visual novel' characters. However, in many visual novels, there are often diverse characters. There could be a young hero or heroine as the main character. Maybe there are some mysterious figures that are part of the 'a3' concept. They could be people with special abilities or knowledge that the main character has to interact with, either as allies or antagonists.
I don't have enough information to determine who the main characters in '707 visual novel' are. It could have a diverse cast of characters such as a brave hero, a cunning villain, and some interesting side characters.
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 don't know for sure as I haven't read it. But usually in a visual novel, there are protagonists and antagonists. The main characters could be a young hero or heroine trying to achieve a certain goal, like saving their town or finding a lost treasure.