The dark lord himself is obviously a main character. There may also be a young hero or heroine who stands against him.
The main characters could include the dark lord, of course. And there might be some of his loyal followers like Death Eaters in the 'Harry Potter' universe. On the other side, there could be a group of brave wizards and witches. For example, a wise old wizard who has knowledge of the dark arts and tries to guide the younger generation in fighting the dark lord. There could also be a young student at Hogwarts who discovers the dark lord's plot early on and becomes a key figure in the resistance.
The dark lord's rise in the fanfiction might involve his manipulation of political situations within the wizarding world. He could start by influencing key figures in the Ministry of Magic. Then, there could be a series of mysterious disappearances or strange accidents that are actually his doing, all part of his plan to create chaos and rise to power.
In the 'rise of the dark lord novel', the main character is likely to be the dark lord. However, there may also be characters like his minions or followers who play important roles in his rise. On the other side, there could be a wizard or a knight who tries to stop him, and they would also be main characters in the sense that they drive the plot in opposition to the dark lord.
Obviously, the son of the dark lord is one of the main characters. He is likely to be a complex figure, with the potential for both good and evil within him.
One potential 'Dark Lord' could be Lelouch. Since he already has the power of Geass and is a complex character, it's easy to imagine a scenario where he succumbs to the darker side of his power. His intelligence and strategic mind could be used for more malevolent purposes.
Since I'm not familiar with the 'dark rise novel', it's hard to say exactly. However, it's common in such novels to have a main character who has some special ability or connection that makes them crucial in the fight against the rising darkness. There could also be characters who are initially on the fence, not fully committed to either side, but are eventually drawn into the conflict as the story progresses.
Obviously, Naruto would be one of the main characters, just in his new 'dark lord' role. Sasuke could also be a major character, as his relationship with Naruto is so central in the original series. Their dynamic would likely be very different in this fanfiction, perhaps becoming more of an adversarial relationship.
I'm not familiar with the exact details of this fanfiction, but typically in a Harry Potter - based fanfiction with a 'rise of the dark angel' theme, Harry Potter himself would be a main character as he is the hero of the original story. The 'dark angel' would be another crucial character. There might also be other characters from Hogwarts like Dumbledore, who would oppose the rise of the dark angel. Maybe some new characters created specifically for this fanfiction would also play important roles, perhaps characters who are related to the origin or the power source of the dark angel.
There could be a trainer who has a special bond with dark Pokémon as one of the main characters. Maybe also a Pokémon researcher who is trying to understand the sudden rise of dark Pokémon. Another possibility is a powerful dark Pokémon that plays a central role in the story, with its own personality and goals.
It's possible that the main character is a Pokémon researcher who is intrigued by the sudden rise of dark Pokémon. They might study these Pokémon, their behaviors, and their habitats. Along the way, they could encounter other trainers or Pokémon enthusiasts who either help or hinder their research into the dark Pokémon's rise.
Perhaps there is a young and ambitious trainer as a main character. This trainer might start with a single dark Pokémon and through various adventures, build a team of strong dark Pokémon. There could also be a professor - like character who provides knowledge about dark Pokémon and guides the trainer on their journey. Another possibility is a rival who also has an interest in dark Pokémon and constantly challenges the main trainer, driving the plot forward.