Since I haven't read the 'Killers in the Family Novel', it's hard to say for sure. However, we can assume that there is at least one character who is the killer. There could be a family member who starts to suspect something strange is going on, like a daughter or son. There might also be an older family member, like a grandparent, who has some knowledge about the family's dark past and the origin of the killer's tendencies. And of course, there could be other family members who are just living their normal lives until they are drawn into this web of mystery and horror.
Well, there might be a protagonist who is trying to figure out the truth about the killer in the family. It could be a detective - like character within the family, someone who is observant and determined to expose the truth. Then there could be the killer themselves, who might be presented as having a complex personality, not just a one - dimensional villain. There could also be other family members who are either in denial or trying to protect the killer, each with their own motives and backstories.
If this 'the killers novel' has a different approach, the main characters could be not just the killers in the traditional sense. For example, it could focus on the people who unknowingly interact with the killers on a daily basis, and through their eyes, we learn about the killers. Or there could be a group of survivors who band together after being targeted by the killers, and they become the main characters as they fight back and try to expose the killers.
I don't know the exact main characters since I haven't read it. But it's likely that the seven killers are the main focus, each with their own personalities and traits.
Since I haven't read the 'lady killers graphic novel', I can't say for sure who the main characters are. But I would assume there are some male characters who are the 'lady killers' themselves.
I don't know the exact main characters as I haven't read it. But usually in light novels, there are often young and dynamic characters.
The main theme could be about the complex relationships within a family that involve killers. It might explore how family members are affected by the presence of someone with a killer's nature, and perhaps the secrets and lies that are hidden to protect or cover up such a person in the family unit.
Since we don't know the exact story, it could be the killers themselves as the main characters.
Since I don't know the exact 'pretty little killers story', I can't say for sure who the main characters are. But it could be the killers themselves, perhaps two or more young people who are involved in the killing spree. There might also be characters like detectives or investigators trying to solve the crimes.
I recommend the following novels with the main character being a killer: "Five Jin Killer": This sci-fi novel about evolution and mutation described the Star Wars between a clone and a pure human. The main characters were a clone killer who hid a superweapon and a pure human killer who hid the ultimate killer move. The two of them had a romantic relationship and a choice of fate. 2. "Mercenary Queen: The Defiant Missy": The female protagonist was the ace killer of the 21st century. After transmigrating, she became a useless person who was bullied by others. She took in beast pets and had the Magical Beast Army in her hands. She made those who bullied her never return! (Oriental Fantasy-Fantasy Romance) 3. "An Assassin Should Be Full of Meat": This was a fantasy novel. The main character was Yan Zhengyi, who had the Assassin System. He decided to be full of meat and become a meat shield killer. In an army of millions, he would first take all the damage and then take the enemy's head, breaking free from the shackles of a traditional killer. I hope you like these recommendations!
One of the main characters is Mollie Burkhart, an Osage woman who was directly affected by the killings as her family members were targeted. Another important character would be the investigators who were trying to solve the mystery of the murders.
In 'Killers of the Flower Moon: A True Story', the Osage tribe members are key characters. They are the ones whose lives were at stake. There are also the murderers, who were mostly white men greedy for the Osage's oil wealth. And perhaps the investigators or those who tried to bring the truth to light can also be considered main characters as they play an important role in the story's development.