The demon queen is surely a main character. She would bring in all the elements of the demon world, her powers, and her personality. The other main character is the one who is her husband. He might be an ordinary human or have some special qualities. There could also be side characters like the demon queen's servants or the protagonist's friends who play important roles in the story.
It's likely about a story where the main character is married to a demon queen in the context of a visual novel. Maybe it involves their relationship, the challenges they face together, like dealing with different worlds (human and demon) and the reactions of others to their union.
The main characters are the male lead and the demon queen who is his wife. The male lead is an important figure as he bridges the gap between the human and demon worlds through his relationship with the demon queen.
The main characters could include the queen who wears the crown, of course. There may be a prince or princess from another kingdom who has a relationship with the queen, either friendly or adversarial. Additionally, there could be a mysterious wizard or sorceress who has an interest in the queen's crown, either to steal it for its power or to protect it.
I don't have specific information on this visual novel, so I can't say for sure. But it's likely that the Queen of Darkness is a main character. There might also be characters who oppose her, like heroes or rebels.
I'm not sure specifically who the main characters are in the 'queen's gambit visual novel' as it depends on how the developers designed it. But it could be a young chess player, perhaps a girl like in the Queen's Gambit series, who is on a journey to become a great chess master.
In a 'trapped demon visual novel', the main characters are likely to be the demon at the center of the story. There might also be a hero - like figure who is either responsible for the demon's trapping or is on a quest to free it. Additionally, there could be other demons or supernatural beings who are either allies or enemies of the trapped demon, and they would also play important roles in the narrative.
There could be a variety of main characters. Maybe a brave knight who is on a quest to find the demon sword to protect his kingdom from an unknown threat. There might also be a sorceress who has knowledge about the sword and its powers and tries to guide or manipulate others in relation to it. Another possible main character could be a mysterious figure who has a hidden past related to the creation of the demon sword.
There could be a wise old wizard. He might be interesting because he has a vast knowledge of the magical world and often gives advice to the main couple. Another one could be a brave knight who is initially skeptical of the demon queen but later comes to respect her. His character arc from distrust to acceptance would make him interesting.
The story in 'My Wife is Demon Queen' manhwa mainly focuses on the romance and adventures of the couple. They face threats from both within and outside their world as they try to build a life together.
The main characters could include the demon, of course. Then perhaps there's a human character who has a special connection to the demon's quest. Maybe they are a descendant of someone important in the demon's past, or they hold a key to a place the demon needs to reach. Additionally, there might be a group of supernatural beings that are either helping or hindering the demon's journey.