Definitely Darwin is the main one. But it could also include characters like his mentors if he had any, or rivals in the scientific field. It might also feature people from the places he visited during his research voyages, like the crew members of the Beagle. These characters could play important roles in his journey from 'darkness to light', either by helping him or creating challenges for him.
The main character is Darwin. In addition to that, there could be characters who were part of the scientific establishment at the time. Some might have been open - minded and encouraged his work, while others might have been more conservative and resistant. There could also be characters from different social classes and backgrounds that Darwin interacted with, which in turn influenced his thinking and his rise to prominence as depicted in the novel.
Darwin would be the central character, of course. There might also be other scientists or colleagues who either supported or opposed his ideas, family members who influenced his life and work, and perhaps some characters representing the public who were affected by his discoveries.
The main theme might be about Darwin's journey from obscurity or difficult times (the 'darkness') to achieving recognition and success (the 'light'). It could explore his scientific discoveries, personal growth, and the impact he had on the world.
One of the main characters is Kaname Sudo. He's an ordinary high school student who gets dragged into the Darwin's Game. Another important character is Shuka Karino.
Since I haven't read it, I can't say for sure. But it could feature Naruto as a main character, as he is often central in many 'Naruto' fanfics. He might be the one guiding or inspiring the character who is rising from the darkness. Or it could be an original character created specifically for this fanfic who is on their own journey of self - discovery and redemption.
Since I haven't read the 'rise from rubble light novel', I don't know the main characters.
There is Kaname Sudo. He is an important character in the 'darwin's game novel'.
The main character is surely Naruko Uzumaki. However, depending on the plot, characters like Hinata could also be important. Hinata has always had a special connection to Naruto in the original story. In this fanfiction, she might be heartbroken to see Naruko turning to darkness and try her best to stop it. Then there could be new characters created specifically for this fanfiction. These new characters could be dark entities that encourage Naruko to embrace the darkness. They could offer her power, knowledge, or a sense of belonging that she doesn't feel in the light, thus making them key players in her rise to darkness.
A young, inexperienced mage could be a main character. They might be just starting to learn about their powers when the rise of darkness begins. Their naivete could be both a strength and a weakness as they navigate this new, dangerous world. Another could be an old, grizzled warrior who has seen many battles but is now facing an enemy like never before in the form of the rising darkness.
It depends on the writer's vision. Maybe it focuses on the children of the original characters. They could be the ones facing the 'rise of darkness'. For example, if Harry has a son or daughter, they might be the main characters. Or it could also be a side character from the original series, like Neville Longbottom, who has now become a key figure in combating this new wave of darkness in the fan - made story.
Since it's about the Darwin affair, Darwin is likely to be a main character. There might also be other scientists or intellectuals of that era who were involved in the discussions around his work. And perhaps there are some fictional characters created to add more drama to the story, like a journalist who is trying to cover the whole affair or a family member of Darwin who has to deal with the public attention and controversy.
In Brynhildr in the Darkness light novel, Ryota Murakami is a key character. He is a normal boy at first but then becomes crucial in the story of the Brynhildr girls. There's Brynhildr, who has special abilities and a complex personality. Other important characters are the other Brynhildr girls, each with their own powers and stories, and they all play important roles in the overall plot.