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.
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.
Themes like family and found family are quite common. Batman and Nightwing have a mentor - protege relationship which can be seen as a form of family. Harley Quinn, who is often an outsider, sometimes gets drawn into this dynamic. Power dynamics are also a theme. Batman has a lot of power and influence, and how Nightwing and Harley Quinn react to that, whether they challenge it or submit to it, is often explored in these fanfics.
One great 'batmanxnightwingxharly quin fanfic' is 'The Unlikely Alliance'. It shows an interesting dynamic between the three characters. Batman's brooding nature, Nightwing's acrobatic charm, and Harley Quinn's chaotic energy come together in a story full of action and unexpected alliances.
Another theme is friendship. Despite their differences, Harley and the OC form a bond. It could start as a reluctant partnership but develop into a real friendship over time. Like in some fanfictions where they go through tough situations together and learn to trust each other.
The exploration of themes like madness, love, and redemption also contribute. Harley Quinn's journey through these themes makes her relatable in some ways, as we all have our own internal struggles, and her story is one of growth and change in the context of a crazy DC Universe.
One plot idea could be that the OC is a new villain in Gotham. Harley Quinn becomes yandere for the OC because of their unique style of chaos. She starts to stalk the OC, leaving little gifts that are both disturbing and endearing, like a dead bird with a love note.
For Harley, her yandere trait could develop as a result of her constantly being betrayed in her past relationships. When she meets the OC, she sees them as someone she can finally have complete control over, so she becomes overprotective and possessive.