The main character is likely the Gray Man himself.
The Gray Man is surely a main character. He could be joined by other important characters. There might be a mentor - like figure who has guided the Gray Man in the past or a love interest that adds an emotional depth to the story. And of course, there could be villains who create conflict and drive the plot forward as they oppose the Gray Man.
The main character is the Gray Man, of course. He's the central figure around which the whole story revolves. And there are other CIA agents who are either chasing him or have some connection to his past in the agency.
I don't know the main characters in 'gray cells graphic novel' as I haven't read it. It could be a lone hero, a group of friends, or even some extraordinary beings.
The main character is Dorian Gray, of course. He is the young man who makes a fateful deal that his portrait will age instead of him. Lord Henry Wotton is also a significant character. He is the one who influences Dorian with his hedonistic ideas.
I'm not sure who the author of the 'Gray Man Graphic Novel' is. You might need to check the book itself, a library database, or a reliable book - selling website for that information.
The Gray Man himself is likely to be one of the main characters. He's known for his skills and tenacity in the world of espionage.
Court Gentry is the central figure in the Gray Man novel story. He's a former CIA operative with a unique set of skills. Then there are the CIA agents who are tasked with hunting him down. Some of these agents have their own motives and personalities. For example, there are those who are blindly following orders, and others who start to question the morality of what they're doing. There may also be some characters that Gentry encounters during his escape who play important roles in the story, either by helping him or creating more obstacles for him.
The Gray Man himself is the main character. He's a highly skilled operative. There are also likely to be some antagonists, perhaps other spies or powerful individuals who are after him or trying to stop his missions.
The main character is the Gray Man himself. He is a highly skilled and resourceful operative. But there are likely other important characters such as his adversaries. These could be other agents or criminals who are after him or in his way.
There could be other characters in 'gray man stories' too. Maybe there are people who encounter the Gray Man. They could be local villagers or travelers. These characters play a role in the stories as they react to the presence of the Gray Man, and their experiences add to the overall plot.
The main character is a young girl. She is the one through whose eyes we see the whole story unfold.