In 'the good doctor stories', there could be main characters like a surgeon who is known for his steady hands and fearless approach in the operating room. There may also be a general practitioner who is really good at diagnosing rare diseases. And then there could be a young intern who is full of enthusiasm and eager to learn from the more experienced doctors.
I'm sorry I don't know who the main characters are as I haven't read it. It could be the good doctor himself, of course. Maybe there are also some patients who play important roles, and colleagues like nurses or other doctors.
The main character is Shaun Murphy. He's a young doctor with autism and savant syndrome. His unique perspective on medicine and life in general is central to the story.
The good doctor is the central figure. In addition, there could be a patient's family member who is very involved in the patient's care and has a lot of interactions with the doctor. This family member might be pushy at times, demanding the best for their loved one, or they could be very cooperative and understanding. There may also be other doctors in the same hospital who are colleagues of the good doctor. Some might be jealous of his success, while others might be friends and allies, and together they contribute to the overall story.
Often, the main characters are the doctors themselves. They could be military doctors like those in the British Army during the Falklands War.
There are also often other Time Lords and various alien species involved. The Time Lords play an important role as they are at the center of the Time War. Some of the alien species are either the enemies in the war or the victims caught in the crossfire. Their interactions with the War Doctor add depth to the stories. For instance, there might be a species that the War Doctor tries to protect from the Time War's destruction, which shows his compassionate side even in the midst of all the chaos.
The Doctor is obviously one of the main characters. He's the time - traveling hero who gets into all sorts of adventures.
Well, obviously, the good doctor is one of the main characters. He is likely to be the central figure around whom the story revolves.
I'm not entirely sure without more context, but usually in such stories there's the titular good doctor. He or she is likely to be the central character, probably a talented but perhaps socially awkward doctor.
Doctor Blake is obviously one of the main characters. He is the central figure around which the stories revolve. He's intelligent and curious, always eager to solve the mysteries related to the ghosts.
I'm not sure as I haven't read the book specifically, but probably the doctor of horror is one of the main characters.