We can only guess at the main characters in 'godkiller graphic novel' without having read it. But generally, in a story centered around 'godkilling', the main character would be the one driving the action towards that end. There could be an opposing force of gods who are the main antagonists. Additionally, there may be characters who are caught in the middle, such as mortals who are affected by the conflict between the 'godkiller' and the gods, and they could be important in terms of providing different perspectives and adding depth to the story.
I don't have information on the specific main characters in 'godkiller graphic novel'. But they could be the 'godkiller' themselves, perhaps a powerful and mysterious figure. There might also be gods or goddesses as important characters, whether as antagonists or more complex characters with their own motives.
Since I'm not familiar with the exact details of 'godkiller graphic novel', it's hard to say for sure. However, in a story like this, the main character is likely to be the one with the ability or mission to kill gods. There could be sidekicks or mentors who help this main character along the way. Maybe there are also representatives of different factions or species in the story, and they could also play significant roles depending on how the plot unfolds.