Well, one aspect to consider in a Tom Riddle and OC fanfic is the portrayal of Tom Riddle himself. If it's well - written, it can show his complex character, his path to becoming Voldemort. The OC in such a fic can add a new dimension. Maybe the OC is someone who tries to prevent his fall into the dark side. However, some fanfics might not do justice to the original lore and make Tom too soft or the OC too overpowered.
A third idea is that the OC is a mental health professional who gets the chance to treat the Joker in Arkham Asylum. Through their sessions, they learn about his past traumas and how they've shaped him into the monster he is. But the OC also has to be careful not to be manipulated by the Joker, which creates a tense and psychological story.
The writing style matters a great deal. It should be able to convey the madness of the Joker and the uniqueness of the OC. Vivid descriptions of the characters' actions and emotions are important. For instance, when the Joker is laughing maniacally, the writing should make you feel the unease. Also, the dialogue should be believable, whether it's the Joker's cryptic remarks or the OC's attempts to reason with him.
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.
One common theme is chaos. The Joker is all about chaos, and when you introduce an original character (oc), it often shows how the oc either thrives in or tries to combat that chaos. For example, in many fics, the oc might be trying to bring some order to the Joker's madness.
Well, in a fanfic where an OC has Wolverine's powers against the Joker, it could start with the OC being in Gotham. The city's dark and gritty nature would contrast with the OC's more animal - like and straightforward power set. The Joker would likely try to use the OC's short temper (a trait Wolverine sometimes shows) against them. Maybe he'd set up situations that would make the OC lash out and cause destruction, which would then turn the city against the OC, putting them in a tough spot.
One interesting Oc and Joker fanfiction could be about an Oc who is a detective trying to outwit the Joker. The Oc has unique skills and a backstory that makes the chase thrilling.
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.
Well, start with a great hook. Maybe your story begins with the OC witnessing the Joker's latest heinous act and being drawn into his world against their will. Then, build the relationship between the two. Let it be a slow - burn, not rushed. Show how the OC changes as they interact with the Joker. They could start as naive but become more jaded. Also, don't forget the setting. Gotham City is a character in itself. Use its dark alleys, seedy underbelly, and imposing skyscrapers to set the mood for your fanfiction. And make sure to have a satisfying ending, whether it's a tragic one where the OC is consumed by the Joker's world or a triumphant one where they overcome him.
One great Joker OC fanfiction is 'The New Face in Gotham'. It creates an interesting original character that interacts with the Joker in a really unique way. The story is full of twists and turns that keep you hooked.