You can try fanfiction websites like Archive of Our Own (AO3). There are often a lot of works in different fandoms there. Just search for 'Young Justice Conner Kent x Vampire OC' and you'll get a list of relevant fanfictions. Another option could be FanFiction.net, though AO3 usually has a more diverse range of content and better tagging system for finding specific types of stories.
One common theme is the struggle between Conner's heroic nature and the Vampire OC's more primal instincts. It often creates a lot of internal and external conflict. Another theme could be the Vampire OC trying to fit into Conner's world of superheroes and justice, while hiding their true nature.
Well, FanFiction.net is another place to look. Search for 'Young Justice Connor Kent' and then manually go through the results to find the ones involving a vampire OC. You could also join Young Justice fan groups on Facebook or Reddit and ask the members if they know of any good fanfictions in this category.
One great Young Justice Conner Kent fanfiction is 'Conner's New Path'. It delves into his struggle with his identity in a really interesting way. Another is 'Conner and the Team', which focuses on his relationships within the Young Justice team. There's also 'Conner Kent: The Hidden Powers' that explores some unique powers he might possess.
Obviously, Conner Kent is the main character. But often you'll also see other Young Justice team members like Robin, Superboy, and Miss Martian. Aqualad might also show up. Sometimes there are villains as well, like Lex Luthor who has a connection to Conner.
The writing style matters a great deal. If the author can vividly describe the scenes, whether it's a fight scene between Connor and a vampire foe, or a romantic moment between Connor and the vampire OC, it makes the fanfiction more enjoyable. The dialogue should also be on point, sounding like how the characters would actually talk in the Young Justice series. And the fanfiction should stay true to the overall tone and lore of the Young Justice world while still adding its own creative elements.
One great conner kent x oc fanfiction could be 'Conner's New Ally'. In this story, the OC might be a new meta - human in town with unique powers. Their relationship starts with a misunderstanding but gradually turns into a strong bond as they fight against common enemies together. It has a lot of action scenes and character - development for both Conner and the OC.
One possible scenario in a Conner and Wendy fanfiction could be them teaming up on a mission. They might start off not getting along well, but as they face challenges together, they begin to understand and respect each other's abilities more. For example, Conner's super strength and Wendy's unique skills could complement each other in combat situations.
I'd say Reddit is worth a shot. There are subreddits for Young Justice where fans discuss various aspects of the show, including fanfiction. You can post a request for speedster OC fanfictions and chances are, someone will come forward with some great suggestions. Additionally, following some Young Justice fanfic writers on Twitter might lead you to their speedster - themed works.
Well, Tumblr can be a great place too. There are many Young Justice fanfic communities on Tumblr. You can search for tags like 'Young Justice Martian OC' and you'll likely find some great fanfictions shared by fans. Some fans also post links to their works on Twitter, so it's worth checking out the #YoungJustice hashtag as well.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). There are a large number of fanfictions about Conner Kent and Tim Drake there. Just search for their names in the search bar, and you'll be presented with a variety of stories, from friendship - centered ones to more action - packed adventures.