I'm not sure as I haven't read it. But it could be some space marines, or leaders of different factions.
Without having read the '40k eternal crusade short story', it's difficult to say exactly who the main characters are. However, in the 40k lore, we often see characters like the Adeptus Astartes (Space Marines) playing important roles. So, it's possible that in this short story, there are some Space Marines at the forefront. There could also be psykers, who have unique powers and often play a significant part in 40k stories. And, of course, there might be some new and original characters created specifically for this short story.
Since it's a 40k story, the main characters might include well - known figures from the different races in the 40k universe. For example, an imperial commander leading the crusade on the side of humanity, or perhaps a powerful alien leader who is trying to resist the crusade. There could also be some unique characters like a lone warrior with a special ability or a group of rebels within a faction who have their own agendas during this eternal crusade.
The '40k eternal crusade short story' could potentially be about the journey of a particular group or individual within the 40k universe during the crusade. It could describe their experiences, the challenges they face such as facing powerful enemies, dealing with difficult terrains, and the moral dilemmas they encounter. It might also show how they grow and change as a result of this crusade, and how their actions impact the overall course of the eternal crusade.
Another type of main characters could be the leaders of different factions. For instance, the commanders in the Imperial Guard who lead their troops into battle against various enemies. Their leadership skills, strategic thinking and the challenges they face while trying to protect their people are often the focus of the stories.
It's hard to say without reading the specific story, but it could be a Chaos Lord who serves Slaanesh. They would be a central figure, leading their followers in the pursuit of Slaanesh - inspired desires.
I don't know for sure without reading it. But it could be the Space Marines. They are very common main characters in Warhammer 40k stories as they are the defenders of humanity.
In Dawn of War Dark Crusade story, the Eldar Farseer is an important character. He uses his psychic powers to guide the Eldar in their battles. Among the Chaos forces, there are Chaos Lords who are the main leaders. They command their daemonic and corrupted troops. And the Tau Ethereals also play a significant role in leading the Tau and promoting their ideology.
I'm not sure specifically as it depends on the details of the novel. But usually, there would be a protagonist who leads the crusade, perhaps a brave warrior or a clever strategist.
There are likely to be Chaos Lords as main characters on the side of Chaos. Maybe a powerful daemon prince leading the charge.
I don't know the specific main characters in this graphic novel. However, they could be crusaders like a brave knight leading the charge, a cunning rogue within the crusade ranks, or a devout priest trying to keep the moral compass of the group.
Without having read the novel, it's difficult to determine the main characters. But it's likely that the 'cursed ones' are central characters. There might also be leaders of the crusade, religious figures, or ordinary people affected by the presence of the cursed ones who could also be important characters in the story.
In a general 'eternal darkness story', there could be a group of adventurers as the main characters. They might come from different backgrounds, like a warrior, a mage, and a thief. Together, they embark on a quest to end the eternal darkness, each using their unique skills.