Perhaps the fanfic could start with Harley Quinn finding out some dark secret about Gotham's underworld that even Batman doesn't know yet. She approaches Batman and Robin with this information, and they reluctantly join forces with her. As they dig deeper, they discover a conspiracy that ties back to Harley's past. This forces Harley to confront her own demons while also helping Batman and Robin fight the greater evil. The story could end with Harley Quinn making a choice between her old life and a new path of redemption.
A plot could involve Robin being kidnapped by one of Harley Quinn's old associates who has a vendetta against her. Batman and Harley Quinn then have to work together to rescue Robin. During the rescue mission, Harley Quinn starts to see Batman in a new light and realizes that his way of fighting crime might be more noble than she initially thought. Meanwhile, Robin, while being held captive, manages to outwit some of the captors, setting up an exciting climax when Batman and Harley arrive.
Perhaps in the fanfic, Robin is captured by Harley Quinn. Batman arrives to save him. Harley Quinn taunts Batman, saying he's too late and that she's already turned Robin to her side. But Robin reveals it was all a ruse to get close to Harley and find out the Joker's next big plan. The scene could be filled with Harley's wild laughter and Batman's stoic determination.
One possible plot could be that Harley Quinn discovers she's pregnant and tries to hide it from the Joker, fearing his reaction. Meanwhile, Batman somehow gets wind of it and feels a sense of responsibility to protect her, not just for the baby's sake but also because he realizes Harley is in a very vulnerable state.
Fanfics about Robin and Harley Quinn with a 'lemon' aspect can be a double - edged sword. On one hand, they can add new dimensions to the characters that we don't see in the official stories. For example, exploring how Robin's sense of justice might clash or blend with Harley Quinn's chaotic nature in a more intimate setting. On the other hand, they can also attract a lot of criticism if not handled well, especially when it comes to staying true to the core of the characters and the overall tone of the original works.
Imagine a fanfiction where a new super - weapon is being developed in Gotham. Poison Ivy and Harley Quinn get wind of it and decide to steal it, thinking it could be used to further their own goals. Batman, of course, is trying to stop them. But as the story unfolds, they all realize that the weapon is far more dangerous than they initially thought. So, instead of fighting each other, they have to work together to destroy the weapon before it destroys Gotham. This forces them to put aside their differences and form an unlikely alliance.
A possible plot could be that Harley Quinn's sister is an undercover agent sent to infiltrate the criminal underworld of Gotham. She ends up getting involved with Harley and the Joker. As she gets closer to her sister, she realizes that Harley is more than just a crazy villain. She then tries to find a way to get Harley out of the criminal life while also dealing with Batman's suspicions of her true motives.
In many fanfics, Harley Quinn realizing Bruce is Batman can lead to some really interesting plot developments. Maybe she discovers it by accident, like seeing Bruce act in a way that's too similar to Batman's mannerisms. It could also be that she pieces it together from some clues that others have overlooked. This realization might make her re - evaluate her relationship with both Bruce and Batman, and it could create a whole new dynamic in the story.
One possible aspect of a Batman and Harley Quinn fanfic could be exploring their relationship in a different light. Maybe in a world where Harley Quinn is trying to break free from her villainous past and Batman is reluctantly helping her. It could be an interesting dynamic as they both have complex personalities.
A Batman and Harley Quinn fanfic could show them forming an alliance against a greater threat. For instance, a new super - villain emerges who is more dangerous than the Joker. Batman realizes he needs Harley's knowledge of the criminal underworld to stop this new foe.
One great 'Batman Harley Quinn' fanfic is 'Harley's Redemption'. It shows Harley Quinn trying to break free from the Joker's influence and finding an unexpected ally in Batman. The story is full of action and emotional moments.
In a fanfic, the relationship between Batman and Robin is typically one of mentor and mentee. Batman is the experienced, brooding hero who guides Robin. Harley Quinn's relationship with them is more complex. She might start as an adversary to both, but as the story progresses, she could develop a begrudging respect for Batman's code and start to see Robin as an innocent in need of protection. Batman, on the other hand, would be initially very distrustful of Harley, but over time might see her potential for good. Robin would be curious about Harley, and his more open - minded nature could be the bridge between Batman and Harley's relationship.