I'm not sure specifically who the main characters are without reading it. But they could be astronauts on a mission to Mars, or perhaps scientists studying the planet.
Well, it's possible that the main characters in the 'mars graphic novel' are a group of adventurers who set out to discover the secrets of Mars. They might have different skills and personalities. One could be a brilliant engineer, another a fearless pilot, and they all work together to face the challenges on Mars.
The princess is surely one of the main characters. There may also be other characters like Martian warriors or maybe an Earthling who somehow gets involved in the Martian affairs.
The protagonist who travels to Mars is a key character. The princess of Mars is another main figure. There could be supporting characters such as wise Martian elders who might guide the protagonist, or evil Martian villains who oppose him. These characters together create the complex web of relationships and conflicts in the story.
Veronica Mars is the central figure in the 'veronica mars graphic novel'. She's a strong - willed and intelligent young woman. Her father, Keith Mars, is likely to be an important character too. He could be a source of advice and support for Veronica. There may also be characters like Wallace, who is her friend and might be involved in some of the events. And then there could be antagonists, like local criminals or people with secrets they don't want Veronica to uncover.
One of the main characters is Ann Clayborne. She is a geologist who is very passionate about understanding Mars in its natural state. Another is Frank Chalmers, who is involved in the political aspects among the colonists.
I don't know the exact main characters since I haven't read the novel. It could be astronauts or scientists.
One of the main characters is Nadia Cherneshevsky. She is an engineer and plays an important role in the construction and development on Mars. Another main character is Arkady Bogdanov. He is a visionary who has different ideas about how Mars should be developed.
John Carter himself is the most notable character. He's the protagonist who drives the story forward with his actions and decisions. Then there's Dejah Thoris, a Martian princess. She is important as she has a relationship with John Carter and also plays a role in the politics of Mars.
I'm not entirely sure, but there might be vampire characters as it is related to vampires. Maybe there's a lead vampire who has a unique personality and abilities.
Since I don't know the exact content of the novel, I can't say for sure. But it could be astronauts, scientists, or even some fictional characters created specifically for this Martian story.
I'm not sure exactly as I haven't read it thoroughly, but they could be astronauts or scientists.