In the 'cherub graphic novel', the main characters are probably the kids who are the cherub agents. These characters are unique as they are children but are involved in high - stakes espionage. There might also be some adult figures who play important roles like guiding the young agents, perhaps an experienced senior agent or a strict trainer. And there could be antagonists, which might be the bad guys the agents are trying to take down, such as criminals or members of enemy organizations.
The main characters in the 'cherub graphic novel' are the young spies within the CHERUB organization. They are the central focus as they go on their various missions. Each of these young characters would have their own personalities, skills, and backstories. Some might be the natural leaders, while others are the tech - savvy ones or the ones with great physical abilities. There could also be supporting characters like the people who run the CHERUB base, providing resources and strategic advice to the young agents, and the adversaries that the agents face, who are likely to be cunning and dangerous.
I'm not entirely sure without reading it fully, but there are likely to be the young agents who are part of CHERUB. There may also be their trainers or handlers.