You can try Archive of Our Own (AO3). It has a large collection of Homestuck fanfictions, including ones about Eridan and Feferi. Just search for their names in the search bar, and you'll likely find many different stories to choose from.
Another option could be Tumblr. There are often fanfiction writers who post snippets or links to their full works on their blogs. You can search for tags like #Eridan x Feferi #Homestuck fanfiction. Sometimes, Tumblr users also form communities where they share and recommend fanfictions to each other.
Fanfiction.net might also be a good place. There are a lot of Homestuck fans who post their works there. However, the interface might not be as user - friendly as AO3. But still, it's worth a shot. You might need to dig a bit deeper to find the really good Eridan x Feferi fanfictions among all the other Homestuck stories.
One popular theme is their complex relationship. Given their different personalities and roles in the Homestuck universe, many fanfictions explore how they interact, argue, and sometimes reconcile. For example, some stories might focus on how Eridan's more abrasive nature clashes with Feferi's more diplomatic and kind - hearted side.
You can try Archive of Our Own (AO3). It has a large collection of Homestuck fanfictions, including those about Eridan and Karkat. Just search for 'Eridan x Karkat' in the search bar and you'll get a bunch of results.
Another theme could be redemption arcs. Maybe Eridan has done something wrong in the story's context and Karkat helps him to become a better person. It can be a really interesting way to develop their relationship within the fanfiction.
One popular 'gamzee x feferi fanfiction' is 'The Deepest Bond' which explores their unique relationship in a very interesting way. It delves into their different personalities and how they interact in the Homestuck universe.
Love, in a non - romantic or a very unique form of romantic sense, is also a theme. Their bond can be seen as a form of love where they care deeply for one another's well - being, whether it's protecting each other from danger or simply being there in times of need. It's a complex and beautiful relationship explored through these themes in the fanfictions.
Archive of Our Own (AO3) is a great place to start. It has a large collection of Homestuck fanfictions, including many about Eridan and Aradia. You can use the search function to specifically look for their pairing and then sort by kudos or bookmarks to find the more popular ones.
Some fanfiction communities on Tumblr might also have 'eridan x gamzee fanfiction'. You can search through relevant tags or ask in the Homestuck - related fan groups. However, the quality can vary greatly, so you may need to sift through a bit to find the really good ones.
You can try Archive of Our Own (AO3). It has a large collection of Homestuck fanfiction. Fanfiction.net is also a popular option. There are also some Homestuck - dedicated fan communities where fans share and discuss their fanfictions.
One common theme is the exploration of their different personalities coming together. Eridan is often seen as more brooding and Gamzee as more chaotic, so their interactions can be an interesting study.
Well, I really like the 'Homestuck x My Little Pony' crossovers. In these fanfictions, the Homestuck characters get thrown into the magical world of Equestria. It's fun to see how they adapt to the pony culture and interact with the ponies. There are also some 'Homestuck x Kingdom Hearts' crossovers that explore the idea of different worlds colliding, just like in Kingdom Hearts, but with a Homestuck twist.