One great Lafayette x Reader fanfiction is 'A Meeting with Lafayette'. It beautifully captures the charm of Lafayette and the developing relationship with the reader. The author does an excellent job of portraying the historical setting, making it feel immersive.
Another theme is the exploration of different historical 'what - ifs'. Fanfic writers like to imagine how things could have been different if Lafayette and Hamilton had made different decisions. This can lead to some really interesting and creative storylines.
The relationship development between Lafayette and the reader is crucial. It should be believable and not rushed. The characters need to have chemistry. For instance, they might start as acquaintances, gradually become friends, and then develop deeper feelings. It should also show how they interact with each other's personalities, like Lafayette's charm and the reader's unique traits.
Another theme is alternate history. Writers might imagine what would have happened if their relationship had taken a different turn. Maybe they had more personal interactions or if Lafayette had played a different role in Hamilton's life in the context of the American Revolution.
There's 'Lafayette and Hamilton: A Different Perspective'. This fanfic takes a unique approach, exploring how their relationship might have developed in different scenarios. It dives deep into their personalities and how they could have influenced each other more than what was shown in history. It's full of interesting plot twists and character development.
You can try searching on Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, including Hamilton. Just use the search function and type in 'Hamilton x Lafayette' to find relevant stories.