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.
Without having read 'the mystery doc novel', it's difficult to name the main characters precisely. However, based on the title, we can assume that the 'doc' is a central character. There might be other supporting characters such as colleagues in the medical profession, maybe a detective if the mystery has some criminal elements, or a family member of the doctor who gets involved in the mystery in some way.
The main character is Doc Savage, of course. He is a very intelligent and strong man.
Doc Savage stands at the center of the novels. He is the hero who drives the action forward. His friends are like a team around him. Monk, for example, provides comic relief at times but is also a valuable fighter. Ham is always well - dressed and uses his legal knowledge to help Doc. Renny's engineering skills come in handy during their adventures. Long Tom's expertise in electricity and Johnny's knowledge in archaeology and geology all contribute to solving the various mysteries they encounter in the Doc Savage novels.
Tomlinson is another important character. He is Doc Ford's friend and often gets involved in the various adventures and situations that Doc finds himself in. He has his own quirks and adds a lot of color to the stories.
The villains in the novel are also important characters. They create the conflicts and challenges that Doc Savage has to overcome. Their evil plans and actions drive the plot forward, making the story full of tension and excitement.
I'm not sure specifically as there could be many novels with such a title. It might be about a mysterious doctor, perhaps involved in solving strange medical cases or uncovering secrets in a medical - related setting.
The main characters are clearly the mom and the son, as well as the doctor who is involved in the sedation process.
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.