The 'extra man' is surely a main character. Additionally, there might be characters representing the society he is in. For instance, there could be a group of people who conform to the norms of the community. Their reactions and interactions with the 'extra man' would be important. There may also be a character who is in a similar situation as the 'extra man' but has chosen a different path, which could create an interesting dynamic and comparison within the story.
The main character, who is a participant in the digital Grail War, is one of the main focuses. Servants like Archer also stand out. Archer is known for his combat skills and his relationship with the main character develops throughout the story. Another important character could be the other Masters competing in the Grail War. They all have their own motives and backstories that contribute to the overall plot.
Since I haven't read the novel, I can't say for sure who the main characters are.
I'm not sure specifically as I haven't read it, but it could be the 'extra' student who is the protagonist. There might also be a strict headmaster or some mean - spirited classmates.
The 'the extra man novel' could be about a person who doesn't quite fit into the normal social or narrative framework. Maybe he is an outsider in a community, or in a story's plot. It might explore his inner thoughts, his struggles to belong, and how he impacts the people around him. For example, he could be a character who disrupts the status quo of a small town or a group of friends, bringing in new perspectives and challenges.
There is also Tamamo no Mae. She has a complex personality and plays an important role in Hakuno's journey. She is a servant with her own motives and abilities, often interacting closely with Hakuno. Another important character is Gilgamesh. His presence adds a lot of power dynamics and interesting plot developments as he is a very powerful and prideful character in the Fate series.
There might be a group of friends as main characters. For example, a studious one who is good at academics, a more athletic character who is popular in sports at the academy, and a social butterfly who knows everyone. They all contribute to the survival and story in different ways in the 'the extra academy survival guide novel'.
Without having read the 'read never die extra novel', we can only speculate. Maybe there is a character who has a special ability related to reading, like being able to enter the worlds of the books they read. There could also be an antagonist who wants to destroy books or limit the power of reading, and the main characters have to fight against this threat. Additionally, there might be side characters such as friends or family members of the protagonist who play important roles in the story, like providing emotional support or helping in the quest to preserve the essence of reading.
We can assume that the central character is the so - called 'extra' in the academy. However, there could be other important characters too. There might be a group of friends that the extra makes along the way. These friends could be other misfits or students who see the value in the extra. There could also be a love interest, perhaps someone who sees the extra for who they really are and not just as an unimportant figure in the academy. And then there are likely to be some authority figures, like the dean or headmaster, whose actions and decisions impact the extra's journey of survival.
Since I haven't read the book, I can't tell you the exact main characters. But usually in an academy - themed novel, there could be students who are the protagonists. Maybe there's a smart and resourceful student who leads the way in survival. There could also be some teachers or mentors who play important roles, either helping or hindering the students' survival journey.
There were many novels where the main character was an extra. One of them was "I, an extra, became popular in the entertainment industry after binding to the system." This novel was about a minor character, Chen Feng, who was originally an extra. After being bound to a peculiar entertainment system, he gradually rose to prominence in the entertainment industry and became extremely popular. In addition, there were also novels such as Hp I'm an extra in Harry Potter and Starting with an extra (Rebirth), which also started the story with an extra as the main character.