Maybe Harley Quinn discovers some dark secret about Nightwing's past that she uses to blackmail him into helping her with a heist. But as they work together, they start to understand each other better. Nightwing realizes Harley isn't all bad and Harley sees that Nightwing has his own demons. In the end, they might even become friends or something more.
First, understand the characters well. Harley Quinn is complex, with her history of abuse and her transformation into a villain - turned - anti - hero. Nightwing is a skilled fighter and a natural leader. Then, create a situation that forces them to interact, like a mystery in Gotham that they both need to solve. Write their dialogue in a way that shows their personalities. For example, Harley might use her unique sense of humor and Nightwing would be more serious but with a touch of sarcasm.
One challenge would be acceptance from their respective communities. The heroes might not accept Nightwing being involved with Harley, a former villain. And the villains might see Harley as a traitor for being with a hero. Another challenge could be protecting the pregnancy from their enemies who might want to harm them or use the baby for their own gain.
Well, the plot could involve a strange experiment that causes Harley Quinn to become pregnant. Nightwing gets involved because he's trying to figure out what's going on. As the story progresses, they have to deal with villains who want to use the baby for their own evil purposes. They might also have to deal with their own personal issues, like Harley's past relationship with the Joker and Nightwing's loyalty to Batman.
Well, for one, it gives Harley a chance at a healthier relationship. Fans are often interested in seeing her break free from the Joker's toxicity. And Nightwing, he's always been a bit of a charming hero. The idea of him being able to see something in Harley that others don't, and her being drawn to his goodness, is really captivating. Also, it allows for new storylines in the Gotham universe that are not the usual hero - villain battles.
One great fanfiction could be 'Harley and Nightwing: An Unexpected Bond'. In it, they might start off as enemies due to their different associations in the Gotham underworld. But as the story unfolds, they discover they have more in common than they thought. Maybe Harley starts to question her loyalty to the Joker when Nightwing shows her a different side of heroism. Another could be 'Love in the Shadows of Gotham' where their love has to be kept a secret because of their different standings in the city.
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.
Yes, it can be. It often delves deeper into Harley's character, her psyche, and her relationship with the Joker. It offers a more in - depth look at her story, which fans usually love.