The main character is likely Chibi Zero. There could be an antagonist, a powerful dark wizard perhaps, who tries to stop Chibi Zero from achieving his goals. And there may be a mentor figure, an old wise creature that teaches Chibi Zero important skills.
One interesting story could be about Chibi Zero's adventures in a magical forest. Maybe he discovers new creatures and has to solve puzzles to find his way out.
I'm not entirely sure as it depends on how the fanfic is written. But it could potentially include Naruto himself as a main character, and perhaps some of the main characters from 'Familiar of Zero' like Louise. They might interact in ways that are unique to this fan - made story.
It depends on the specific fanfic, but it could include characters like Suzaku, who played a major role in the Zero Requiem. C.C. is also likely to be a main character as she was closely associated with Lelouch. And then there are the remaining members of the Black Knights, who would be dealing with the new world situation.
I'm not sure specifically as there are many possible characters in a 'chibi vampire novel'. But it could be the chibi vampire itself as the main character. Maybe there's a human friend who helps the chibi vampire navigate the human world.
I'm not sure specifically, but it could be the chibi vampire itself as a main character. There might also be a human friend who discovers the vampire's secret and becomes an important part of the story.
Based on the title, 'zero' is likely one of the main characters. And perhaps the members of the 'night class' are also important characters in general.
Obviously, Naruto and Sub Zero are the main characters. Naruto is the one being trained, and Sub Zero is the trainer.
The main characters in the 'chibi vampire light novel' usually start with the chibi vampire. Then, there could be a group of characters surrounding them. It might include a nosy neighbor who suspects something strange about the vampire. Or a group of adventurers who the vampire joins on a journey, and through this journey, different personalities clash and bond, creating an interesting dynamic in the story.
Karin is the central figure in the 'Chibi Vampire Karin' novel. Her family, especially her mother and father, are significant characters as they influence Karin's understanding of her vampire identity. Additionally, there are some human boys at her school that become important to the story. One such boy might be a love interest for Karin, and their relationship forms an important part of the plot as Karin tries to manage her feelings while being a vampire.
I'm not entirely sure without having watched it closely, but they are likely to be drug traffickers, law enforcement officers, and maybe some people caught in the middle like informants or family members of those in the drug trade.