There could be the victims' families. They often play important roles as they are directly affected by the unnatural deaths and may be involved in the search for answers or justice.
I'm not sure specifically as I haven't read this exact novel. But usually in a novel about unnatural death, there might be a detective - someone who is dedicated to solving the mystery behind these deaths.
Perhaps there is also a villain or someone with a hidden agenda. This character would be related to the cause of the unnatural deaths, either directly or indirectly, and their actions and motives would be central to the plot.
Another theme might be mystery. Since it's about unnatural deaths, there are likely to be elements of trying to figure out what really happened, who was involved, and what the motives were.
The author is Patricia Cornwell.
The main character is Alex Delaware, a psychologist. There are likely other characters such as police officers or people involved in the cases he is trying to solve.
In 'Unnatural Death A Scarpetta Novel', the story might revolve around Dr. Scarpetta using her forensic skills to solve cases related to unnatural deaths. There could be complex plotlines with twists and turns, such as dealing with difficult evidence, uncovering hidden motives, and facing challenges from other characters. Maybe it also delves into the psychological aspects of the criminals and the victims. The novel may set in a particular city or region, which adds to the atmosphere of the story. The interactions between Dr. Scarpetta and her colleagues or the police are also likely to be an important part of the narrative, as they work together to piece together the mysteries behind these deaths.
I'm not sure specifically as I haven't read the 'death notice novel' in detail. But usually in such novels, there is a protagonist who is likely to be someone involved in solving the mystery or facing the challenges related to the 'death notice'.
The main characters could include the god of death, of course. There might be a human character who has a special connection to the god of death, perhaps a seer or someone with a rare gift. And there could be a council of deities that the god of death has to interact with, whether they are allies or foes. These various characters would each contribute to the overall plot and theme of the novel.
Since I'm not familiar with the book, it's hard to say who the main characters are. But they could be humans who are involved in the robotics industry, like engineers or scientists. Or perhaps there are some special robots that are the focus, such as a robot detective or a powerful combat robot.
Since I don't know the specific 'death watch novel', I can't say for sure. But they could be the people on the death watch, like a doctor, a family member, or a professional caregiver.
Since I don't know the specific 'death crone novel', I can't say for sure. But likely, the death crone herself would be a main character. There might also be characters whose lives she affects, like a young hero who tries to stop her evil deeds if she's a villain, or a person seeking her wisdom if she has a more ambiguous role.
The main character is Gustav von Aschenbach, an aging writer. And then there's Tadzio, the beautiful young boy who becomes the object of Aschenbach's obsession.