Since we don't know the exact details of the novel, we can only speculate. There could be a group of space explorers as main characters. Among them, there might be a strong - willed female character who is not afraid to face the space vampires. There could also be an alien character who has some knowledge about the space vampires and teams up with the humans to fight against them. Or perhaps a rogue vampire who is hunted by both its own kind and the humans because it doesn't follow the rules of the vampire society in space.
I'm not sure as I haven't read it. But it could have a brave space captain as one of the main characters who has to deal with the vampire threat.
Maybe there is a scientist character who discovers the existence of the space vampires first. And there could be a vampire hunter who has some special skills or weapons to fight against these space - dwelling vampires. Another possible main character could be a vampire who has some sort of different view or goal compared to the others of its kind, and this vampire might play a key role in the story's development.
I'm not sure exactly as I haven't read the specific 'Adopted by Vampires' novel. But typically, the adopted character would be a main character. There would also likely be the vampires who adopt this character, perhaps an older, more powerful vampire who acts as a sort of mentor or parental figure in the vampire family.
I'm not sure specifically as there could be many different characters in such a novel. It could have a vampire protagonist who is trying to navigate the world in Chicagoland while dealing with his or her vampiric nature.
The main characters could also include other vampires who might not be too happy about the vampire having a pet. They could see it as a weakness or something against their vampire code. There might also be some characters who are friends or allies of the vampire - pet duo, like a wizard who helps them out when they're in trouble.
One main theme is the struggle between good and evil. Just like in traditional vampire stories, the vampires in space - set novels often represent the evil force preying on others, and the protagonists fight against them.
I'm not sure exactly who the main characters are without reading the novel, but it could be a vampire hunter who is on a quest to deal with these chicken legged vampires.
Perhaps there is a human character who befriends the vampires. They could be a key figure in helping the vampires adapt to modern human society or vice versa. They might also be the love interest of one of the vampires.
Often, there's a strong and brooding male vampire as one of the main characters. He might be an ancient vampire with a tragic past.
I'm not sure specifically, but it could be some powerful vampires in Chicagoland and perhaps some humans who are important to the story.
I don't know as I haven't read it, but usually in vampire novels, there could be a vampire leader as a main character, perhaps a human who gets caught up in their world too.
I don't know for sure as I haven't read this particular novel. But in Argeneau novels, there are usually characters from the Argeneau vampire family. So there might be some members of that family as main characters in this one too.