Well, of course, there's the little vampire himself. He could have a best friend who is a human, a brave kid who is not afraid of the vampire's nature. There might also be an old vampire mentor who teaches the little one about vampire traditions and how to control his thirst.
One great 'Little Vampire Gregory' fanfiction is 'Gregory's New Adventure'. It takes Gregory into a modern city and shows how he adapts to new technology while still being a vampire. It's really interesting to see how the author blends the traditional vampire traits with modern settings.
Well, it depends on the specific content of the novel. If it doesn't have overly scary or inappropriate themes like excessive violence or complex adult emotions, it could be suitable for children. Some 'little vampire' stories are full of fun, like a little vampire trying to fit into a human world, which can be quite engaging for kids.
One common theme is the struggle between the vampire's nature and the human world. Since they are vampires, they have different needs like drinking blood, but they also want to interact with humans. Another theme is friendship. Often, a little vampire will form a strong bond with a human or another supernatural being. For example, in many fanfictions, the vampire has a human best friend who helps him navigate the human world.
A 'the little vampire fanfic' has the potential to be a creative take on the concept. It could introduce new characters that interact with the little vampire. These new characters could be from different supernatural backgrounds, like a friendly werewolf or a magical fairy. The fanfic could also delve into the little vampire's emotions more deeply, such as his feelings of loneliness or his desire to be more like a human at times.
One great Vampire Knight little girl fanfiction could be about a young girl who discovers she has a special power in the Vampire Knight universe. It might involve her befriending some of the main characters like Zero or Kaname in a really cute and innocent way.