A theme that frequently appears is redemption. Crowley, being a demon, may be on a path of redemption through his relationship with fem Harry. There's also the theme of the outcast. Both characters can be seen as outsiders in some ways. Harry is often an outsider in the Muggle world and Crowley is an outcast among demons. Their relationship can be a way for them to find acceptance. And of course, there's the love and attraction theme, which is central to most fanfictions with this pairing.
You can try fanfiction websites like Archive of Our Own (AO3). There are a vast number of fanfictions there, and you can use the search function to specifically look for 'fem Harry x Crowley' fanfictions. Another option could be Fanfiction.net, although AO3 generally has a more diverse and inclusive range of works in terms of pairings and themes.
A plot twist could be related to Fem Harry Potter's magical abilities. Since she is raised by Crowley, she might develop some unique magical skills that are a blend of wizarding magic and Crowley's own brand of 'power'. This could make her a target for various groups in the wizarding world who either want to use her for their own gains or are afraid of her new - found powers. Also, Crowley might have some enemies in the wizarding world that he has never revealed to Fem Harry Potter. When these enemies discover her existence, they target her to get back at Crowley, putting her in great danger and forcing her to rely on skills and knowledge she has learned from Crowley to survive.
A fem Harry x Charlie pregnancy fanfiction could explore different themes. For example, it could focus on the reactions of their friends and family. Maybe Harry's friends from Hogwarts are shocked but supportive. Charlie, being a dragon keeper, might have his own concerns about bringing a child into a world where his job is so dangerous. It could also show how they adapt to their new roles as parents - to - be.
Fem Harry Potter's character would develop a greater sense of independence and self - reliance. Crowley is not the type to coddle, so she would have to learn to fend for herself from a young age. This could lead to her being more confident in her own abilities, but also more solitary. She may not feel the need for the approval of others as much as the original Harry Potter. Also, her moral compass might be more flexible. Since Crowley doesn't adhere to strict good - vs - evil concepts, she would be more likely to question the black - and - white view of magic that is prevalent in the wizarding world.
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.
Yes, there are likely some out there. You can start by looking on popular fanfiction websites like Archive of Our Own. Just search for 'Harry is Crowley's mate' and you might find some interesting stories that explore this unique pairing. Different authors will bring their own interpretations and storylines to this concept.
One great fem Harry x John Constantine fanfiction is 'The Enchanted Encounter'. It has a really interesting plot where fem Harry and Constantine team up to fight a powerful dark magic entity. The author does a wonderful job of developing their relationship throughout the story.