Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfics, and you can use the search filters to specifically look for non - adult stories about Ed and Winry. Just type in their names in the search bar and then look for the appropriate rating filters.
Rather than seeking 'lemon' fanfic which is inappropriate, you could explore the official manga or anime for great Ed and Winry moments. Their relationship is beautifully developed over the course of the story. You can also join fan communities and ask for non - adult fanfic recommendations about them. There are many talented writers who create heartwarming and exciting stories about Ed and Winry without any adult content.
There are fanfics that delve into their childhood memories and how those experiences shaped their relationship. For example, the times when Ed was getting his automail fixed by Winry's family. These fanfics often add more depth to their bond and show how their feelings for each other grew over time. It can be really interesting to see different interpretations of their relationship in these fan - created stories.
Many fanfics focus on the growth of Ed and Winry's relationship. They have a unique dynamic where Ed's alchemical pursuits and Winry's work with automail are both important aspects of their lives. Fanfic writers might show how they support each other in achieving their goals. For instance, Winry could provide Ed with new automail designs that enhance his combat abilities, and in return, Ed could inspire Winry to create even more advanced automail. This mutual support can be a central theme in exploring their relationship in fanfics.
One common theme is the unspoken love between them. They've known each other for so long that their feelings might be there but not fully expressed at first. Another theme is the way they rely on each other. Ed depends on Winry for his automail maintenance, and Winry counts on Ed to bring her new challenges in automail design. Also, the theme of growth is prevalent. As they face different challenges in the world of alchemy and automail, they grow both individually and in their relationship.
One common theme is love and relationship development. Since they've known each other for a long time, fanfics often explore how their feelings change from friendship to something more romantic. Another theme is family, as Winry was like family to Ed when they were growing up, and fanfics may play with that dynamic in their relationship.
In many Full Metal Alchemist fanfics about Ed and Winry, their relationship is often deepened and explored in unique ways. Some fanfics might focus on their childhood bond and how it evolves as they grow older. Ed's journey as an alchemist and Winry's skills as an automail mechanic can play important roles in these stories. For example, Ed might rely on Winry's automail repairs not just physically but also emotionally, seeing her as a constant in his tumultuous alchemist life.
I'm not sure specifically about 'lemon' fanfiction as it often involves inappropriate content. However, there are many great Edward x Winry fanfictions that focus on their relationship development, like those exploring how they support each other after Edward's return from his travels. You can find them on popular fanfiction websites by using the search terms 'Edward x Winry' and filtering out the inappropriate ones.