Since we don't have a lot of information about 'the 8th man novel', it's difficult to name the main characters specifically. But in addition to the 8th man, there could be a love interest for him. There might also be some side characters who provide comic relief or important information at crucial moments in the story. It could also be that there are other characters with whom the 8th man has a past connection, and this connection affects the events in the novel.
I don't know the exact main characters as I haven't read the novel. But surely, the 8th man is one of the main characters. There might be his friends or foes who play important roles in the story.
The most obvious main character is the 7th man. But in a story, there are often other characters who interact with the main one. In this case, there could be comrades if he was in a group situation, or perhaps an antagonist who causes problems for him. There might also be a love interest, which could add an emotional layer to the story. Without reading the story in detail, it's hard to name all the main characters precisely, but the 7th man is surely at the center of it.
Since we don't know the details of the '7th man story', the main characters could be the 7th man himself and the people around him in the story.
In 'the 7th man short story', the most significant character is the 7th man. He is the narrator and the one whose inner thoughts and emotions are explored deeply. His friend, who was unfortunately swept away by the wave, is also a main character in a sense. His presence, or rather his absence after the wave, is what drives the 7th man's story. There may be other minor characters around the 7th man, but they are not as crucial to the core of the story as these two.
The main character is the 7th man himself. He is the narrator and the one whose experiences the story focuses on. His friend, who was taken by the wave, is also an important character, though we don't get as much direct information about him.
The main character is surely the 12th man. He is the focal point of the story. Besides him, there might be characters like his comrades in a military - like scenario, or his teammates in a sports - related story. Maybe there are also antagonists or challenges in the form of opposing forces or difficult situations that he has to face, which could be personified as characters in a way. For example, in a military story, the enemy soldiers or the harsh weather conditions could be considered as 'characters' that interact with the 12th man.
Since I don't know the specific '7th heaven novel', I can't say for sure who the main characters are. They could be angels, humans on a spiritual journey, or some other fantastical beings.
I'm not sure specifically as I don't know which light novel series you're referring to. But generally, it could be the same main characters from the previous novels, just more developed.
I'm not sure specifically as I haven't read it. But it could be a student who is the central figure, dealing with the failure in the 12th grade. There might also be teachers or family members who play important roles in their journey.
The main characters include a young woman and her father. There are also likely other characters they meet during their journey through the kingdoms, like the rulers or magical beings.
I'm afraid I can't answer who the main characters are in this novel. You could check the book's description on the cover or at the back, or look for some reader reviews which might mention the main characters.