Without having read the 'dragon war god novel', it's difficult to say for sure. However, common main characters in such a story could be a brave human warrior who has to face the might of dragons and gods. Or perhaps a dragon with special powers that becomes a central figure. There might also be a god or goddess who is either a protagonist or an antagonist, depending on the plot of the novel.
In the 'dragon blooded war god novel', the main character is surely the one with the dragon blood. He or she would be central to the story. There could be side characters like friends who join the protagonist in battles. Maybe there's an antagonist, a powerful figure who opposes the dragon - blooded character. It could also have a love interest for the main character, adding an emotional aspect to the story.
I don't know for sure as I haven't read it. But I assume there is a war god character who has a dragon mark. There might also be characters who oppose the war god or are his allies in his journey related to the box.
The main character is of course the one with the dragon mark. His name might be [specific name if known]. He is a determined and powerful figure who is constantly evolving in the story.
There could be a mentor figure who helps the main character understand and control their dragon - blooded powers. And perhaps an antagonist, someone who opposes the main character's growth or has a conflicting agenda regarding the power of the dragon blood.
Kratos is surely one of the main characters. He is the central figure in the God of War series.
In the 'God of War 3 Novel', the central character is Kratos. He is the driving force of the story, seeking revenge on the gods. Zeus is a major character as he is the main target of Kratos' wrath. Also, Athena has an important part as she has a complex relationship with Kratos. Other gods such as Hermes also make appearances and are part of the conflicts that Kratos faces.
Since I don't know the exact 'the god of war novel', it's hard to say. But surely the god of war himself would be a main character. There might also be other gods or goddesses who interact with him, like his allies or enemies.
The main character is Kratos. He is a Spartan warrior seeking revenge. Another important character is Ares, the God of War, who plays a major role in Kratos' story.
Since the novel is named 'dragon marked war god novel', it's very probable that the main character is the war god who has this dragon mark. He would be the central figure around whom the plot, battles, and other events in the story would revolve.
I'm not sure specifically as I haven't read it in detail, but likely the war god with the dragon mark is a main character. There might also be some friends or allies who support him on his journey.