Obviously, Neon is one of the main characters. She's known for her energetic and unique personality. Often, her friends from Team FNKI like Flynt Coal can also be main characters. They usually support Neon in her adventures or join her in battles against the Grimm or other villains.
A fanfic titled 'Neon's Dance of Power' might be really cool. It could show Neon using her unique fighting style, which is influenced by her dancing, in battles against Grimm. She might also have some sort of self - discovery journey within the story, learning more about her Semblance and how to use it more effectively.
Well, in kurapika and neon fanfiction, a common theme could be the contrast in their worlds. Kurapika is from a tragic background with his clan's destruction driving him. Neon, on the other hand, is a part of a wealthy and powerful family. Fanfic writers may play with the idea of how these two from such different walks of life come to understand each other. Maybe Kurapika sees in Neon a glimmer of innocence that he wants to protect, or Neon could be intrigued by Kurapika's mystery and strength.