First, you need to have a clear idea of the characters and their personalities. Then, come up with an interesting plot that fits the Vocaloid world. Make sure the story is engaging and has a unique twist.
One sad Vocaloid story is about a virtual singer who was created with so much hope but was gradually forgotten as new models emerged. She sang songs full of longing and loneliness, but with time, fewer and fewer people listened. Her digital existence became a sort of purgatory, still singing in the virtual world with no one to truly appreciate her art.
Circus Monster by Vocaloid's story is a blend of imagination and intrigue. It takes you on a journey through a magical circus where unexpected things happen and secrets are unveiled.
I'm not entirely sure as there could be various interpretations. It might be a novel series related to Vocaloid that has a theme associated with the night. Maybe it involves Vocaloid characters in stories that take place during the night, such as adventures or mysteries.
The uniqueness of Vocaloid Lemon fanfiction lies in its combination of the Vocaloid characters with a lemon - themed concept. Usually, it can bring a fresh and tangy - like flavor to the stories, making them stand out from regular fanfictions.
One popular Vocaloid OC fanfiction is 'The Melodic Adventure of [OC Name]'. It tells a story about a Vocaloid OC's journey to find her unique voice in the world of music. Another is 'OC's Harmony in the Digital Realm' which focuses on how an OC interacts with the official Vocaloid characters and overcomes various challenges. There's also 'Vocaloid OC: A Star is Born' where the OC starts from being an unknown entity and gradually rises to stardom in the Vocaloid universe.
Too slow for a novel often means that the plot progresses at a snail's pace, and it takes ages for anything exciting or meaningful to happen. If readers feel like they're slogging through pages with no payoff, that's a sign of being too slow.
Since I don't have specific information about this 'night series vocaloid novel', it's hard to say who the main characters are. But generally in Vocaloid - related works, there could be popular Vocaloid characters like Hatsune Miku, Kagamine Rin and Len, etc. Maybe they are the main characters in this novel series as well.
I'm not entirely sure as there might be a lot of different interpretations. It could be about some sort of nightmarish or negative events that happen within the Vocaloid universe, perhaps involving the characters in Vocaloid having a 'bad end' during a night - related scenario.
One great fanfic is 'A Melodic Encounter'. It beautifully portrays the relationship between Len and Miku. The story has a magical setting where their voices combine to create a new world. It's full of sweet moments and the writing style is really engaging.