One common theme is the power struggle. The Joker is a powerful and chaotic character, and the OC often has to find a way to either match his power or outwit him. For example, in many stories, the OC might have a unique ability that gives them an edge in this struggle.
Well, a frequent theme is the struggle for power. The Joker is a power - hungry character. In these fanfictions, the OC might be trying to gain power within the criminal underworld that the Joker and Harley operate in. Also, the theme of redemption can sometimes be there. Maybe the OC tries to redeem Harley from her life with the Joker. There are also themes of loyalty and betrayal as the characters' relationships shift and change.
Yes, there are some. You can start by looking on fanfiction websites like Archive of Our Own. There you might find unique takes on the relationship between the Joker, an original character (OC), and Harley Quinn. Some stories might explore the darker aspects of their relationships, while others could be more about the OC's influence on the dynamic duo.
First, give the OC a unique backstory. For example, if they are from a poor part of Gotham and had to fight their way up, it would shape their character. Second, give them a distinct personality trait like being overly curious or having a strong moral code that clashes with the Joker and Harley's world.
One good OC character type could be a medical student. The Joker gets injured and the OC is the one who has to patch him up in the chaos of a Gotham emergency room. This sets off a chain of events where the OC is both horrified and fascinated by the Joker. Also, a magician OC would be cool. They could have a battle of wits and magic - like skills with the Joker, who is always up for a challenge. And a vigilante OC who has a different approach to justice than Batman and somehow crosses paths with the Joker.
One common theme is the corruption of innocence. The male oc often starts out with some sense of normalcy or goodness, and the Joker gradually chips away at that. Another theme is the exploration of chaos and order. The Joker represents chaos, and the male oc may be trying to bring some order or may be completely swept up in the chaos. Power dynamics is also a theme, with the Joker usually being in a position of power over the male oc, at least initially.
The theme of unpredictability is quite common too. The Joker is famously unpredictable, and when you add a criminal OC into the mix, it amps up the element of surprise. Readers never really know what they are going to do next. Whether it's a sudden change in alliance or a new scheme they come up with, this keeps the readers on the edge of their seats. It also allows for a lot of creativity in the writing as the authors can take the story in unexpected directions.
One popular one could be 'The Dark Alliance' where the Joker teams up with a powerful original character who has telekinetic powers. Their interactions are full of chaos and mind - games.
One reason is the clash of personalities. The Joker is a chaotic and unpredictable character, while a badass OC (original character) can bring in a fresh and unique dynamic. Their interactions can range from intense confrontations to unexpected alliances. It's like watching two forces that are so different collide and create new and exciting storylines.
One idea could be that the OC is a psychologist assigned to study the Joker. As she tries to understand his mind, she gets drawn into his chaotic world. Another could be the OC is a new criminal in Gotham who catches the Joker's attention and they form an unlikely alliance against other villains. Maybe the OC has a special ability like mind - reading and the Joker wants to use it for his own gain.