In a Crowley x OC fanfiction, a key element is the relationship development. Start with an interesting first meeting, like the OC stumbling upon Crowley during one of his schemes. Then, build up the tension or connection between them gradually. Another element is the dialogue. Crowley has a very distinct way of speaking, so the OC's dialogue should contrast or complement his. And don't forget to include some sort of conflict, whether it's an external threat or an internal struggle within the characters themselves.
One common theme is redemption. The OC might be the catalyst for Crowley to seek some form of redemption. Another theme is forbidden love, as Crowley is a demon and there are often barriers in a relationship with a normal OC. Also, power dynamics, like how Crowley's demonic powers compare to the OC's own abilities or lack thereof.
Another theme is the relationship between the OC and Crowley. It could be a friendship, a mentorship, or even a romantic relationship. In many fanfictions, this relationship is at the heart of the story and drives the plot forward. The development of this relationship over time is often a key aspect.
I really like 'Crowley's Unlikely Companion'. In this fanfiction, the chemistry between Crowley and the reader is off the charts. It starts with a simple meeting but quickly escalates into a story full of adventure and a bit of mystery. The way the author writes Crowley's dialogues is very much in - character, which adds to the authenticity of the story.
One great 'crowley x ferid fanfiction' could be 'The Unspoken Bond'. It delves deep into their complex relationship, exploring their shared history and the unspoken emotions between them. The writing is vivid and really brings out the personalities of both characters.
I've heard of a few Crowley and OC fanfics where the OC is a witch. In these stories, the relationship between Crowley and the OC often involves a power struggle and mutual fascination. You can also try looking on fanfiction.net, but AO3 generally has a more organized tagging system for this kind of specific search.
Another one to check out is 'A New Chapter for Crowley with an OC'. It's a bit different in that it focuses more on how the OC brings about change in Crowley's life. The writing style is very descriptive, allowing you to really visualize the scenes and the interactions between the characters. It's a really good read for fans of Crowley and OC fanfictions.
Characterization. A good Crowley x Reader fanfiction nails Crowley's character. He should be that suave, sometimes morally - grey character we know from the source material. And the reader character should be relatable, like someone who could actually exist in that universe. For example, if Crowley is in his demon form, the reader's reaction should be believable.
Well, a lot of 'crowley x reader' fanfictions have the theme of self - discovery. The reader might be on a journey of self - discovery while also getting involved with Crowley. Another theme could be the struggle between good and evil. Crowley has his own moral compass which might be different from the reader's, and this creates an interesting dynamic. There's also the theme of friendship or companionship that can develop into something more, which is often explored in these fanfictions.