What are some interesting plot ideas for 'Joker x Harley x OC fanfiction'?

One idea could be that the OC is a new villain in Gotham who catches the attention of both Joker and Harley. Maybe the OC has a unique power or skill that makes them a threat or an ally. For example, the OC could have the ability to manipulate minds, which Joker wants to use for his own evil plans, while Harley sees the OC as a potential friend who can understand her chaotic nature.

One idea could be that the OC is a psychologist assigned to study the Joker. As she tries to understand his mind, she gets drawn into his chaotic world. Another could be the OC is a new criminal in Gotham who catches the Joker's attention and they form an unlikely alliance against other villains. Maybe the OC has a special ability like mind - reading and the Joker wants to use it for his own gain.

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.

One idea could be exploring their relationship before Harley fully embraced her criminal side. Maybe show how the Joker manipulated her in the early days. Another could be a story where they have to face a common enemy in the Suicide Squad universe that forces them to re - evaluate their relationship. Or perhaps a story where Harley starts to break free from the Joker's control and how he reacts to that.

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.

One plot idea could be the Joker trying to prove his love to Harley in a really extreme way, like taking over Gotham City and dedicating it to her. It shows his over - the - top and crazy way of loving.

One idea could be a story where Harley Quinn tries to break free from the Joker's control completely and starts her own life of crime without him. She could form her own gang and prove that she's more than just the Joker's sidekick.

First, give the OC a unique backstory. For example, if they are from a poor part of Gotham and had to fight their way up, it would shape their character. Second, give them a distinct personality trait like being overly curious or having a strong moral code that clashes with the Joker and Harley's world.

Another plot might involve the Joker facing a new rival in the criminal underworld, and Harley Quinn has to choose between staying loyal to the Joker or making her own path. This could lead to a lot of drama and action, like Harley using her acrobatic skills and unique weapons to fight the new threat while dealing with her feelings for the Joker.

One interesting story could be about Vampire Joker trying to turn Harley into a vampire like him. Maybe he sees her chaos and madness as a perfect match for his vampiric nature. They could go on wild adventures in Gotham's underworld together.