One great 'oc x Harley Quinn fanfiction' is 'Harley's New Ally'. In this story, the original character (oc) is a vigilante who crosses paths with Harley Quinn. They start off as enemies but gradually develop an understanding. The author does a great job of capturing Harley's complex personality and how the oc challenges her views. It has some really interesting action scenes and character interactions that make it a fun read.
A good 'oc x Harley Quinn fanfiction' often has unique plot twists. Maybe the oc has a secret that changes Harley's perception of them completely. Or perhaps Harley has a goal that the oc initially opposes but later comes to support. The story should also have good writing in terms of grammar and style. If the writing is sloppy, it can be really hard to get into the story. And the fanfiction should explore the themes that are relevant to Harley Quinn's character, like freedom, madness, and the search for identity, through the relationship with the oc.
Give the OC a unique backstory. For example, if they grew up in the slums of Gotham but had a love for art, it could influence their actions and interactions with Harley. Maybe they use their art skills to create elaborate disguises or distractions during their escapades.
One idea could be that the OC is a new villain in Gotham and Harley Quinn takes an immediate liking to their chaotic style. They team up to pull off a heist on one of Gotham's richest, with Harley's unpredictable nature and the OC's unique skills making for an exciting adventure.
The Fem OC could be a reformed hero who is trying to stop Harley Quinn from her villainous ways. But as they interact more, they start to understand each other's perspectives and end up teaming up against a bigger threat in Gotham. This would involve a lot of character development for both of them as they learn from each other.
Yes, there are many. You can find some on popular fanfiction websites like Archive of Our Own. Some explore Harley's complex relationship with Batman, often delving into her chaotic nature and how it interacts with Batman's sense of justice.
Another great writer is 'DeadlyHarley'. They are excellent at writing the banter between Harley Quinn and Deadpool. Their stories often feature really funny and witty exchanges between the two characters, making the reading experience very enjoyable. There are also new and upcoming writers who are making a mark. Writers like 'PoolAndQuinnNewbie' might not have a huge following yet, but their fresh take on the relationship between Harley and Deadpool is really interesting, bringing in new ideas and perspectives to the fanfiction world.
In Harley Quinn x Joker fanfic, the character development is often a focus. Harley's transformation from a psychiatrist to a criminal sidekick is interesting. Writers may play with different timelines and scenarios in the fanfic. For example, they might explore what would happen if Harley finally broke free from the Joker's influence earlier than in the original story. This can lead to various plot twists and new character arcs for both Harley and the Joker.