One idea could be that Batgirl and Harley Quinn are forced to team up to take down a new supervillain in Gotham. They start off as reluctant allies but gradually come to respect each other's skills. For example, Batgirl is impressed by Harley's acrobatic skills and Harley is in awe of Batgirl's detective work.
Harley Quinn's age can vary depending on the specific storyline and interpretation. But typically, she's depicted as being in her late twenties or early thirties.
A plot might involve Harley Quinn getting amnesia. Batgirl finds her and decides to help her. In the process of trying to help Harley regain her memory, they form an unlikely bond. But as Harley's memory starts to come back, she remembers that she has a score to settle with some of Gotham's criminals, and Batgirl has to decide whether to support her or stop her.
Well, the character development in Harley Quinn Batgirl fanfic can be really fascinating. Since Harley has such a complex backstory, fanfic can further explore her journey towards redemption or her descent into more madness, especially in relation to Batgirl. Batgirl, on the other hand, might have to face new challenges when dealing with Harley. Maybe she has to learn to understand Harley's motives better instead of just fighting her. And the art of world - building in these fanfics is also cool. Writers can create a Gotham City that is even more gritty and dark, or they can add some magical elements that change the whole dynamic between the two characters.
Well, perhaps in the fanfic, Harley Quinn has kidnapped someone important, like a scientist who was working on a new technology that could be dangerous in the wrong hands. Batgirl hears about it and goes to confront Harley. There's a series of battles where Harley uses her acrobatic skills and her signature mallet, while Batgirl uses her gadgets and martial arts. In the end, Batgirl manages to rescue the hostage and send Harley back to Arkham Asylum.
It depends on how the writer wants to portray it. But generally, Batgirl has a good chance of winning. She has extensive combat training and is highly intelligent. She can analyze Harley's moves and come up with counter - strategies quickly.
The Joker is also an important character. He has a major influence on Harley's life, as he was the one who led her down the path of villainy in the first place. Their relationship is a key part of the story.
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.
In the main DC Comics storyline, the Joker and Harley Quinn did not have any children. Their relationship was complex but didn't involve having a family together.