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.
Love is also a theme, though it can be in different forms. It might be a romantic love where the OC and Harley fall for each other. Or it could be a platonic love where they care deeply for one another like family. This adds a lot of depth and drama to the stories.
Power dynamics is another theme. Given Harley Quinn's complex relationship with power, especially in relation to the Joker, the male oc can bring a new element to this. Maybe he has his own power struggle within the DC underworld, and his relationship with Harley Quinn either complicates or simplifies that struggle. It could also involve themes of loyalty and betrayal, as in the world of DC, alliances can be fickle.
There are several. The theme of obsession is frequently seen. Harley's obsession with Batman is a big part of their relationship in fanfiction. Also, the idea of Batman being a source of stability or hope for Harley in some stories. And the exploration of their shared Gotham city, how their relationship is affected by the city's dark and dangerous environment.
One common theme is friendship. Often, the female oc starts as a stranger to Harley Quinn and they gradually become friends. They support each other through various challenges in the Gotham underworld.
One common theme is redemption. Often, the OC might be involved in trying to help Harley find a new path, away from her villainous ways. For example, in some fics, the OC could be a hero - type character who believes in Harley's potential for good.
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.
Another theme is chaos and adventure. Since Harley Quinn is often associated with mayhem in Gotham, the OC gets dragged into her wild adventures. They might face off against other villains or try to outwit the Batman together, which makes for exciting reading.
The themes often revolve around power dynamics. The Joker is a powerful and unpredictable figure, and Harley Quinn is both his lover and his accomplice. When the reader enters this equation, there are power struggles and manipulations. Another common theme is the exploration of mental illness and how it affects relationships. Given Harley Quinn's backstory and the Joker's insanity, this adds a layer of depth to the relationships depicted in the fanfiction.
Well, many Jason Todd x Harley Quinn fanfictions revolve around the idea of healing. Both characters have been through a lot of trauma. So, stories might focus on how they heal each other. Another theme is the exploration of their moral compasses. They both have different views on right and wrong, and fanfics often explore how they reconcile those differences. And of course, the theme of adventure is common, as they go on wild rides through Gotham, facing various villains and challenges together.
One common theme is the clash of two different worlds. Harry Potter's world is full of magic and order in a way, while Harley Quinn is from a chaotic, more modern and violent world. So the contrast and how they deal with it is often explored.