A really interesting fanfiction could be set in an alternate universe where the rules of the Vampire Diaries and whatever world Lemon is from are combined. Elijah and Lemon are brought together by a prophecy, and they must figure out how to fulfill it while dealing with their growing feelings for each other.
I'm not sure about specific authors dedicated to this pairing as it's a rather unique combination. But you could start by looking at popular fanfiction platforms like Archive of Our Own. Check the tags related to Elijah Mikaelson and Lemon, and look for the stories with the most hits and positive reviews. The authors of those are likely to be good ones.
One great Elijah Mikaelson love story fanfiction is 'Elijah's Unwavering Love'. It beautifully portrays his complex character in a romantic relationship. The way the author weaves the plot around his love for the female lead is really engaging.
The plot matters a great deal. It could be something unique like the reader being from a different time or dimension and how they interact with Elijah in that context. Good fanfiction also has great dialogue. The conversations between Elijah and the reader should be engaging and reveal more about their characters and feelings. It can't be just bland small talk. If it's set in the Vampire Diaries or The Originals universe, it should also stay true to the overall lore of the series.
There are many amazing Elijah Mikaelson fanfictions. 'Elijah's Legacy' is a fanfic that looks at how he tries to leave a positive mark on the world despite his past deeds. It has some great character development. 'The Dark Side of Elijah' is interesting too as it explores the parts of him that he tries to hide from others. And 'Elijah and the New Beginning' is a story about him starting anew, away from all the chaos of his family and past.
There's also 'Elena's Choice: Elijah or Else' which explores the idea of Elena having to make a difficult decision between Elijah and other aspects of her life. The story is filled with tension and drama.
One common theme is redemption. Elijah often has a past full of darkness, and through love, he tries to find redemption. For example, in many fanfics, his love for a certain character makes him want to be a better person.
Rather than seeking sex - related fanfiction, you could look for stories that explore Elijah's complex personality. For example, some fanfictions might focus on his loyalty to his family, his moral dilemmas, or his interactions with other characters in a non - sexual way. These can be really interesting and engaging reads.
One common theme is romance. Writers often pair female Elijah with other characters, either from the show or original characters they create. Another theme is power struggles. Given Elijah's powerful nature in the show, in fanfiction, a female Elijah might also face challenges related to power within the vampire - werewolf - witch world. Family dynamics is also a theme, exploring how she interacts with her family members in new and different ways.
A lot of fanfictions explore the idea of them building an unexpected friendship. For example, Elijah's old - world charm and Elena's determination might lead to some interesting interactions. They could start by just sharing stories about their families and pasts, which gradually deepens their bond.
To write a good 'Harry Potter Elijah Mikaelson' fanfiction, focus on character development. Since you're bringing two different sets of characters together, show how they grow and change as a result of their interactions. For instance, Elijah might learn something new about loyalty from Harry, and Harry could gain a new perspective on power from Elijah. Also, create a vivid setting that combines the elements of Hogwarts and the Mikaelson's home. Add in some exciting conflicts and resolutions, like a battle against a common enemy that only they can defeat together.