A common theme could be the exploration of an unlikely relationship. Since they are from the same universe but not the most obvious pairing, it makes for an interesting dynamic. Another theme might be the characters' growth within the relationship, as they come to understand each other better.
I'm not sure of specific kakyoin x holly fanfics off the top of my head. But often, fan communities on social media platforms like Reddit or Tumblr might discuss and recommend such fanfics. You could join relevant groups or follow tags related to 'kakyoin x holly' to discover some great reads.
One possible theme could be adventure. Maybe jotaro and kakyoin go on a journey together on horseback, facing various challenges along the way. Another theme might be friendship. The horse could act as a symbol of their bond, something they take care of together and through which their relationship deepens.
One possible plot could be that Kakyoin and Jotaro come across a mysterious horse in their adventures. This horse has some special abilities related to the 'Stand' powers in 'JoJo's Bizarre Adventure'. They then have to figure out how to handle this horse and how it might be related to their mission.
Well, finding 'jotaro x kakyoin horse fanfic' might be a bit niche. However, you could also check out some JoJo's Bizarre Adventure fanfic communities on Reddit or Discord. There, fans often share and discuss their favorite fanfics. Maybe someone has come across or even written a story about jotaro and kakyoin involving a horse in those communities.
There might not be a lot of fanfic specifically focused on 'kakyoin x jotaro horse'. It could be a rather niche concept. You may need to look through general fanfic collections about these characters and see if there are any that incorporate the horse element in an interesting way. For example, perhaps a story where they go horse - riding together in a particular setting within the 'JoJo's Bizarre Adventure' universe.
The plot is crucial. It could be a new adventure that brings them together in an unexpected way. Maybe they have to team up against a new threat that neither could face alone. A good fanfic also plays with the relationship dynamics between them, whether it's a budding romance or a strong friendship that deepens over the course of the story. It should also have good writing quality, with proper grammar and engaging descriptions that draw the reader into their world.
A strong plot that ties them together is essential. It could be a common enemy they have to fight, like a new villain who is threatening both the human and fairy realms. Their journey to defeat this enemy can show their growth as characters and the development of their relationship.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a large collection of fanfics, and you can search specifically for 'Artemus Fowl x Holly' to find relevant stories.
Common themes include the exploration of their unique relationship. Given their different species, there's a lot to explore about how they interact and understand each other. Also, the theme of loyalty is often present. They have to trust and be loyal to each other in many of the fan - created scenarios, whether it's facing a common enemy or dealing with internal conflicts in their respective worlds. And of course, there's the theme of discovery, both of themselves and of the world around them as their relationship progresses.