Well, without knowing the exact 'Dark Lord Light Novel', we can only make general assumptions. The main character would be the dark lord, who might have a complex personality. There could be a female lead who is either an enemy trying to bring down the dark lord or a love interest that adds a different dimension to the story. And then there might be an old sage - like character who has knowledge about the dark lord's past and tries to guide the other characters in their fight against or alongside the dark lord.
In a 'the dark lord novel', the main characters could be the dark lord, who is the source of the conflict. There might be a young and inexperienced protagonist who discovers the threat of the dark lord and decides to fight against him. There could also be side characters like the dark lord's minions, who add to the complexity of the story. For instance, the minions could have their own motives and loyalties that are not always straightforward. And perhaps there is an old and wise mentor figure who guides the hero in the fight against the dark lord.
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.
The main characters would probably include the titular Dark Lord, who is likely a powerful and complex figure. Then there's the character whose goal is to tame him. This character could be a young and inexperienced person who grows throughout the story. There may also be antagonists who oppose the idea of taming the Dark Lord, either because they fear his power or have their own evil plans. Additionally, there could be characters from the Dark Lord's past, like former allies or enemies, that play a role in the taming process as their relationships and past events are uncovered.
Apart from the dark lord, there are often heroes in 'dark lord stories'. These heroes are brave and determined to stop the dark lord's evil plans. Sometimes there are also side characters like the dark lord's minions or wise old sages who give advice to the heroes.
Perhaps there is an antagonist in the 'lord of light novel'. This character would oppose the 'lord of light' and his followers. He or she could be driven by envy, a thirst for power, or a different ideology. Their clashes with the protagonists would be a key part of the story and help to define the other main characters.
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.
The main character is Ainz Ooal Gown. He is a powerful undead magic - user.
The main characters in 'Lord of Goblins' light novel could include a goblin scout who is very good at gathering information about the surrounding areas and potential threats. There might also be an old and wise goblin elder who provides guidance based on his long - lived experience.
I'm not entirely sure as I haven't read this particular light novel in detail. But usually, in such novels, there is likely to be a protagonist who is central to the story. Maybe the 'Pleasure Lord' is one of the main characters.
I'm not sure about the main characters in 'lord titanheart light novel' as I haven't read it. But usually, there is the titular character, Lord Titanheart. There may also be sidekicks or companions who join him on his journey, like a brave warrior or a wise mage.