I'm not sure exactly as I haven't read it. But usually in a light novel, there would be a protagonist who is likely at the center of the story dealing with the heavenly curse. There may also be a mentor - like character to guide the protagonist.
The main themes could include things like fate, as the word 'curse' might imply some kind of pre - determined negative situation. Also, it might deal with moral and ethical issues. Maybe there are elements of good versus evil as well.
The main characters in the 'Heavenly Delusion' light novel often include those who are at the forefront of the story's action. There may be a young protagonist who is curious about the world and sets out on a journey. There could also be an older, wiser character who serves as a guide or mentor. And perhaps there are some characters who are part of a group or faction, and their interactions with other characters play a crucial role in the development of the story.
Since I haven't read it, I can't say for sure. But it's likely that the holy swordsman himself is a main character. There might also be a female lead who could be a mage or a healer, helping the swordsman in his journey against the curse.
The titular Heavenly Demon Instructor is obviously a main character. He is the central figure around which the story revolves, with his unique skills and teachings.
I don't know the main characters in this light novel. It could be a young swordsman who is the protagonist and has a special bond with the Heavenly Inquisition Sword.
The central figure is the Heavenly Demon who has been reborn. Alongside him, there may be mentors or elders who play important roles in his growth. Then there are antagonists, probably powerful figures from other factions who oppose the Heavenly Demon. And there could be some female characters as well, perhaps love interests or comrades who fight alongside the main character.
I'm not entirely sure who all the main characters are without delving deeper into the novel, but usually there is a central protagonist who is closely tied to the Heavenly Jewel's power.
There's a good chance that the king is a main character. Alongside him, there could be a love interest for the king, who is deeply affected by the curse. There may also be a seer or a prophet who has some knowledge about the curse and its solution. Additionally, there could be traitors within the king's court, which adds more drama to the story as they either try to take advantage of the king's weakened state or prevent the curse from being lifted.
I don't know who the main characters are in 'the curse of desire novel' as I haven't read it.
I'm not sure as I haven't read it, so I can't tell who the main characters are.