In the 'superman doomsday graphic novel', the two most prominent characters are Superman and Doomsday. Superman, with his strength, speed, and other super - abilities, is on a mission to save the world. Doomsday, on the other hand, is a behemoth of destruction. He has no other goal but to cause chaos. These two characters are what the entire graphic novel focuses on. Their battle is what the readers are most interested in, and the other characters kind of play secondary roles in relation to this central conflict.
The main characters are Superman and Doomsday. Superman is the iconic hero, and Doomsday is his formidable adversary.
Well, of course Superman is one of the main characters. He's the symbol of hope and has all his superpowers to fight for justice. Then there's Doomsday, a creature that seems to be designed just to be a killing machine. Their conflict drives the whole story in the 'superman doomsday graphic novel'. There may be other supporting characters like Lois Lane who add to the story's depth, but Superman and Doomsday are at the center of it all.