There's no way to know exactly without reading the novel. However, if it follows a common pattern, apart from the death crone, there could be a group of adventurers who cross paths with her. Maybe there's a healer in the group who tries to counter the deathly influence of the crone. Or there could be a wizard who wants to study the power of the crone for his own purposes.
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.
I'm not sure specifically as there could be many novels with this name or concept. It might be about a deathly or menacing old woman, a 'crone', perhaps involved in a dark or supernatural story.
The cartoon old crone is often depicted as ugly and mean-looking. She might have a wrinkled face and a sinister expression.
Clipart cartoon crones often have exaggerated features like big noses, wild hair, and sometimes a crooked smile. They might be dressed in old-fashioned or quirky outfits.
I don't know the specific 'City of Death Novel' you're referring to, so I can't say for sure. But it could have a brave hero who is trying to save the city from whatever is causing all the death.
I'm not sure specifically as I haven't read the novel, but likely there would be a detective or an investigator type of character who is trying to solve the mystery of the death.
I'm not sure without reading the book, but often in a novel set in Death Valley, there could be a rugged explorer as a main character.
The main characters are likely the Death Troopers themselves. They play a central role as the novel is named after them.
Since I haven't read the 'ambassadors of death novel', I can't say for sure who the main characters are.
Since it's called 'Untimely Death A Novel', the main character might be the one whose death is untimely. There could also be those around this person, such as the people who are most affected by the death. Maybe a lover who is left behind and has to deal with the pain and confusion. Or a sibling who starts to question the events leading up to the death and tries to find out the truth. It's also possible that there is a character like a doctor or a coroner who has some role in the events following the death.
Since I don't know the 'death tropper novel' well, I can't say for sure. But it might have a fearless leader among the death troopers as a main character.