In 'Overlord', the main character is Momonga. He was once a normal player but becomes the all - powerful Overlord in the game - turned - real - world. In 'That Time I Got Reincarnated as a Slime', Rimuru Tempest is the protagonist. He starts as a slime but gains many powers and friends along his journey. In 'KonoSuba', Kazuma Satou is the main character, a NEET who is transported to another world and has to deal with all kinds of wacky situations.
I'm not entirely sure as there could be multiple main characters. But generally, there would be a protagonist who is summoned to the other world and is likely involved with the slave - summoning and magic aspects.
Since there are many 'isekai maou to shoukan novel' out there, it's hard to name the exact main characters. However, in general, the protagonist who is summoned and turned into a maou is a key character. There could be side characters such as the local inhabitants of the isekai world. Some might be friendly and help the maou - protagonist, while others could be hostile. Maybe there's a female lead who has some sort of relationship with the maou, whether it's friendship, love, or rivalry.
In 'isekai maou to shoukan web novel', the main character is likely to be the maou who gets summoned. This character would have unique abilities and a personality that drives the story. There could also be side characters who either oppose or support the maou. For example, there might be a princess who initially fears the maou but later comes to understand and perhaps even help him. Or there could be other demon lords or powerful beings in the story's world that interact with the main maou character.
I'm not entirely sure as I haven't read the exact novel. But based on the title, the main characters are likely to be the 'Maou' (a demon - like or very powerful character) and the'shoukan dorei' (the summoned slaves). There might also be other supporting characters like the ones who summoned the Maou or the people in the isekai world that the Maou and slaves interact with.
I'm not sure specifically as I haven't read the novel thoroughly. But typically, there would be a protagonist who gets summoned to the other world.
Since it's an isekai story where the main plot seems to revolve around the demon king and the summoned girl slaves, the demon king is surely a key character. He might be someone with unique powers or abilities. The summoned girl slaves could be diverse characters with different personalities and skills. They might be used for various purposes in the story, like helping the demon king in his adventures or causing trouble for him. There could also be other supporting characters like local inhabitants of the isekai world who interact with the main characters.
One popular 'isekai maou light novel' is 'Overlord'. It follows the story of a powerful player who gets trapped in a game world as his in - game character, a very powerful magic - using overlord. Another is 'That Time I Got Reincarnated as a Slime'. In this novel, the protagonist is reincarnated as a slime in a different world and gradually becomes a powerful being. There's also 'KonoSuba: God's Blessing on this Wonderful World!', which features a unique isekai adventure with a group of misfit characters.
The main characters in the 'Maou Yuusha' light novel are the Demon Lord and the Hero. The Demon Lord has his own goals, powers, and a certain way of ruling or existing in the demon world. The Hero, on the other hand, is tasked with fighting against the Demon Lord. But as the story progresses, they may find themselves in situations where they have to work together. There could be other important characters as well, but these two are the most prominent and their relationship forms the core of the story.
The main characters are Maou, the Demon Lord, and Emi, the hero. Maou is a complex character who has his own goals and reasons for his actions, not just a one - dimensional 'evil' being. Emi is strong - willed and determined to fulfill her duty as a hero.
This light novel focuses on the concept of being sent to another world (isekai). Once there, the main character gets involved with the mechanics of summoning slaves. The magic system in the novel is also a key factor. It might deal with how the protagonist uses magic in relation to the slaves, like for protection, or in battles against various foes in the new world. It could also explore themes like morality regarding the treatment of summoned slaves and the protagonist's growth as they adapt to this new reality.