Without reading the 'king's ransom novel', it's hard to be precise about the main characters. However, we can make some educated guesses. There would likely be a king, as the title implies his ransom is central. There might be a group of advisors around the king, some of whom may be good and some bad. There could be a character who is a mastermind behind the ransom plot, maybe a disgruntled noble or a foreign invader. And there could be a character who emerges as the savior, a young and fearless warrior or a wise old mage perhaps.
I'm not familiar with this specific 'king's ransom novel', but generally, it could have the king as a main character. There might also be a hero or heroine, like a brave knight or a clever courtier, who tries to deal with the situation of the ransom. There could also be an antagonist, the one who holds the king captive and demands the ransom, which could be another king, a powerful warlord, or a group of rebels.
Since I don't know the exact 'king's ransom novel', I can't say for sure. But it might have a king as one of the main characters, and perhaps a villain who demands the ransom.
I'm not sure specifically as there could be many novels with this name. It might be about a large sum of money or treasure related to a king, perhaps a story of ransom demands for a king or something associated with a king's wealth.
The main character is the hero who ventures into the city to fight the bad guys. There are also various thugs and bosses that act as antagonists.
Since I haven't read it, I can only guess. It could be a young and curious protagonist, perhaps a boy or a girl, who is brave enough to enter the hollow city. There might also be some sort of guide or mentor figure, someone who has some knowledge about the city's secrets. And of course, there could be antagonists, like those who want to keep the secrets of the city hidden or those who are causing trouble within the city.
I'm not sure as I haven't read it, but usually in this kind of novel, there could be a young and curious protagonist who is drawn to explore the Hollow City.
There are three main characters in 'The Ransom of Red Chief' full story. Firstly, there are the two kidnappers. They are the ones who initiate the whole kidnapping scheme, thinking they can get rich quick. Then there is Red Chief, the boy they kidnap. He is a very energetic and mischievous boy who completely turns the tables on the kidnappers. He is not at all the meek victim they expected, but rather a force to be reckoned with.
I'm not sure who the main characters specifically are in 'River City Ransom Underground Story' without more information.
Typically, you have the kidnapped victim, who can be a protagonist from the original work that the fanfiction is based on. Then there are the kidnappers, who could be villains with various motives. And of course, there are the family members or friends of the victim who are trying to get them back.
I don't know who the author of the 'kings ransom novel' is. You might need to check in a library catalog or a book database.
The main character is surely the king's daughter. There could be other characters like her mother, the queen, if she is present in the story. Maybe there is a villain, someone who wants to harm the king's daughter or the kingdom. And there might be a loyal servant or friend of the daughter who helps her through difficult times.
Since I don't know the exact novel, it's hard to say. But likely, the king and the woman would be main characters.