His allies are important characters too. They might help him in his battles or in his quest to understand himself better. For example, if there are other characters who are also dealing with similar technological alterations, they could be his comrades. And his enemies are crucial as well. They create the conflict in the story, whether they are other cyborgs, or those who want to use Deathlok's power for their own evil purposes.
Obviously, Deathlok himself is the most important character. He is the central figure around which the story revolves. There may also be his creators or the people who turned him into a cyborg, who are important as they set the whole story in motion.
The theme of survival is also prominent. He is constantly in dangerous situations, fighting against various foes, and has to use his unique abilities to stay alive. And there could be a theme of morality as well. Given his enhanced capabilities, he has to make choices about how to use his power, whether for good or for his own self - preservation.
John Constantine is the most important character, of course. He's a complex anti - hero. He has a rough exterior, often smoking and drinking, but is extremely intelligent when it comes to dealing with the occult. Then there are the various demons and devils he has to face, like Nergal. Nergal is a powerful demon that often causes trouble for Constantine.
The protagonist is surely an important character. He is the one who drives the story forward with his decision to go into the wild. There may also be characters from his past life, like his family members, who play a role in shaping his journey.
Supergirl herself is of course the most important character. Then there's often Superman, her cousin, who can play a significant role in her story, either as a mentor or as someone she compares herself to. Also, her friends on Earth, like those she meets at school or in her daily life, are important as they represent the normal part of her world that she tries to protect.
Sif is an important female character in Thor's life. She is a skilled warrior and has a complex relationship with Thor. The Enchantress is a villainous character who often tries to manipulate Thor for her own gain. Her magic and seductive ways add a different dynamic to the story.
Batman is obviously an important character. Also, the villains like the Joker are likely to be important in this graphic novel.
Obviously, Napoleon himself is a very important character. His character would be central to the plot, showing his actions, decisions, and personality. There might also be his generals, like Murat or Ney, who played important roles in his military campaigns.
Then there's Ajak. Ajak serves as a sort of leader or guide among the Eternals. He has a deep understanding of their history and purpose. His wisdom is relied upon by the others when they face difficult choices or need to understand their place in the grand scheme of things.
In 'deathstroke graphic novel', Deathstroke is central. But his family members can also be very important characters. For example, his children might play a role in his story, either as a source of motivation or as a complication. Also, his handlers or employers, if he has any, could be important as they give him missions and influence his actions.
Batwoman herself, Kate Kane, is of course very important. And there are her allies like Luke Fox.