One common theme is adventure. Since they are both from the One Piece world which is full of adventures, fanfictions often put them in new and exciting adventures together. They might explore uncharted islands or face new and powerful enemies.
A highly recommended one is 'The Law - Robin Connection'. This fanfiction explores the backstories of both characters and how those past experiences bring them closer together. It's not just about their relationship but also about their individual growth within the context of the One Piece universe. There are some great character - building moments and a really engaging storyline.
Another theme is the idea of two broken souls finding solace in each other. Law has his past traumas and Robin has her own. Fanfics might show how they heal each other in a relationship. For example, in some stories, Law's cold exterior starts to melt because of Robin's warm and understanding nature. And Robin, in turn, finds a sense of security with Law. There are also adventure themes where they team up and use their unique skills to overcome obstacles.
A common theme is the exploration of their intellectual connection. Both Law and Robin are very intelligent characters, and fanfics often show them sharing knowledge or strategizing together.
In such 'fire emblem robin x robin fanfiction', it often creates a very different narrative compared to the original game. The relationship between the two Robins can open up new plotlines. It could be about how they support each other in battles or in strategic decision - making. Maybe it shows a side of Robin that was not fully explored in the game, like their ability to rely on a version of themselves. This kind of fanfiction can also attract readers who are interested in seeing alternative character developments and relationships that are not part of the main game storyline.
Fanfiction.net is also a great place. There are many One Piece fanfictions, including those about Law and Robin. However, the quality may vary, so you might need to read the summaries and reviews before choosing one.
One good fanfiction could be 'The Law and Robin Alliance' which focuses on their adventures together and how their skills complement each other. It has a great plot that shows their growing bond as they face various challenges in the One Piece world.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions, including many 'Robin x Robin' ones. Just use the search bar and type in 'Robin x Robin' and you'll get a bunch of results.
A common theme is self - reflection. Since it's Robin interacting with their own self, it often involves looking inward. Another theme could be growth. As the two versions of Robin interact, they might learn from each other and grow as characters.