Obviously, the lone necromancer is a main character. There might also be an antagonist, perhaps someone who opposes the necromancer's use of dark magic. And there could be a sidekick or a mentor figure, someone who either helps the necromancer understand their powers better or tries to lead them onto a different path.
I don't know for sure, but it's likely the lone necromancer himself.
I'm not entirely sure as I haven't read it in full. But generally, a 'lone necromancer' theme might involve a character who is a necromancer and perhaps on some sort of solitary journey. It could be about his adventures in a world where necromancy is either feared or revered, facing challenges and enemies while using his necromantic powers.
Since I don't know the specific 'lone wolf light novel', it's hard to say. But it could be the lone wolf character themselves, who might be a mysterious figure with unique abilities or a troubled past.
The most obvious main character is the necromancer himself. His journey forms the core of the story.
Well, one interesting thing is the world - building. In a 'lone necromancer light novel', the setting could be a dark and mysterious place. It might have a society that either fears or tries to control necromancy. The conflicts that the lone necromancer faces, whether it's against other powerful entities or the moral dilemmas of using necromancy, are also great aspects to look forward to.
Well, the obvious main character would be the necromancer. There might be some side characters like a detective who is trying to figure out the strange happenings related to the necromancer. And perhaps there's a character who has some sort of special connection to the necromancer, like a childhood friend or a mentor figure who knew the necromancer before he fully embraced his powers. Another possible main character could be an antagonist, a powerful figure who wants to stop the necromancer from causing chaos or wants to take over his powers.
Since I don't know the specific 'absolute necromancer novel', I can't say for sure. But usually, there would be the necromancer as a main character. There might also be some sort of mentor figure who either teaches the necromancer or tries to stop them depending on their stance on necromancy.
In 'the lone ranger novel', the central character is the Lone Ranger. He is the masked hero who rides Silver. Alongside him, Tonto plays a significant role. Tonto is not only his friend but also a valuable ally. They work together to combat evil in the Wild West. There may also be various villains that they face, like bandits and corrupt lawmen, which also contribute to the story as antagonists.
Shiroe from 'Log Horizon' has knowledge of the necromantic spells in the game world of the light novel. He is one of the more intelligent characters who can understand and potentially use such magic. In 'Death March to the Parallel World Rhapsody', the protagonist also has run - ins with necromancers and their undead creations, making those necromancers somewhat notable characters within the context of the story.
I'm not sure specifically as I haven't read it. But likely, the main character would be the 'lone wolf' character, who might be a mysterious or brooding type.