Not having read the 'lady killers graphic novel', it's difficult to determine the main characters precisely. But generally, there should be characters who are identified as lady killers, which are probably male characters with a certain charisma. There may be supporting characters like friends or rivals of these lady killers. And of course, there would likely be female characters in the story, some of whom might be central to the plot, either being the focus of the lady killers' attention or having their own independent storylines that intersect with the actions of the lady killers.
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'm not sure specifically what 'lady killers graphic novel' is about as there could be many with that name. It might be about characters who are considered 'lady killers', perhaps in the sense of being very charming or dangerous to women in the context of the story told in the graphic novel.
The main character is surely the lunch lady. In addition to her, there could be other cafeteria staff members who play important roles. There might be a student journalist who is writing a story about the cafeteria and gets to know the lunch lady well. And perhaps a janitor who shares some interesting stories with the lunch lady during their breaks. All these characters could interact in different ways to drive the story forward in the 'lunch lady graphic novel'.
I don't know for sure, but it's likely that Lady Justice herself is one of the main characters.
The main character is Lady Death herself. She is a central figure driving the plot.
The main character is likely Lady Amalthea. However, in a graphic novel, there are often other important characters to drive the story forward. There could be an older, wiser character who imparts knowledge to Lady Amalthea. There might be a young and brave character who looks up to her. And of course, there could be a villainous character with his or her own motives and backstory. These characters would interact with Lady Amalthea, creating conflict, drama, and character development throughout the graphic novel.
As I haven't read it, I can't say for sure. But probably the lady who the title refers to is one of the main characters. There could also be knights, servants, or other nobles in the castle as important characters.
In the 'lady deadpool graphic novel', Lady Deadpool is the key character. She has her own story arc, goals, and motives. In addition to her, there could be other characters who are important for the plot. For example, if the story involves a mission or a battle, there might be a group of mutants or superhumans she teams up with. Or there could be a villain who is a major obstacle for her, someone with their own unique powers and a vendetta against Lady Deadpool or those around her.
The main character is Lady Mechanika. There may also be other supporting characters that she interacts with in her adventures.
Obviously, the Lady of the Lake is one of the main characters. King Arthur might also be a major character as his relationship with the Lady of the Lake, especially regarding Excalibur, is a significant part of the Arthurian legend. Merlin could be in it too as he is often intertwined with the events and characters in this mythology.
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.