I don't know as I haven't read this book. Maybe there's a detective as the main character.
Since it's a mystery novel, it could involve a complex plot with various characters. There might be a mysterious event at the start, like a murder or a disappearance. The characters in 'the holdout' would then try to piece together clues, face challenges and obstacles, and there could be some unexpected twists and turns along the way that keep the readers on their toes.
There are two main characters in the 'Frankenstein mystery novel'. Victor Frankenstein is a very important character. He is the one who dares to cross the boundaries of nature and create life. His actions and decisions are at the core of the mystery. Then there is the monster. It is a complex character. It is born into a world that doesn't accept it and its struggle and actions are what make the story so mysterious. There are also some secondary characters like Frankenstein's family members, but the two main ones are Victor and his creation.
In the 'Mystery of the Emblem Novel', there could be a young protagonist who stumbles upon the mystery of the emblem by accident. There might also be an old sage - type character who has some knowledge about the emblem's history but is reluctant to share it all at once. And perhaps there's a villain who wants to use the emblem for their own malicious purposes, like taking over a kingdom or something similar.
There could be a variety of characters. There might be a strong and resourceful man who is good at building shelters and finding food. There could also be a woman with a kind heart who takes care of the others emotionally, and perhaps a child who brings out the protective side of the other characters.
I don't know the specific main characters in 'the mystery guest novel' as there's not enough information given. But usually, there would be the mystery guest themselves, and perhaps a protagonist who tries to figure out the mystery around the guest.
I don't know the exact main characters as I haven't read it. But likely, the doctor is one of the main characters. There could also be a nurse or a patient who plays an important role in the story.
There could be a lot of potential main characters in a dime mystery novel. It might have an amateur sleuth who stumbles upon the mystery. There could also be a police officer who is initially skeptical of the sleuth's abilities but later teams up with them. And perhaps a victim's family member who is desperate for answers and helps in the investigation in their own way.
Since I'm not familiar with the specific 'cupcake mystery novel', we can only guess. It could have a young and ambitious baker as a main character, who is trying to make a name for themselves with their unique cupcakes. Then there could be a rival baker who might be involved in some underhanded activities that lead to the mystery. And of course, there would likely be a character, maybe a journalist or a food critic, who starts to dig deeper into the strange happenings around the cupcakes and becomes an important part of the story.
There is also a local woman who seems to be involved in the mystery more than she initially lets on. She has her own backstory and relationships that are slowly uncovered as the plot progresses in the 'Still Life' mystery novel.
Well, the obvious main characters would be the mystery guest and the maid. However, there could be other important characters too. For instance, if the story is set in a big mansion, there could be a butler who has some knowledge about the mystery guest or has his own suspicions. Or perhaps there is a local detective who gets involved when strange things start to happen because of the mystery guest. And of course, there could be other maids or staff members who either help or hinder the maid in her quest to understand the mystery guest.