Yes, there are likely fanfictions out there with such a plot. Fanfiction writers often explore different character relationships, and the relationship between Robin and Luffy is an interesting one to develop in non - canon stories.
One possible plot could be that Robin realizes her feelings for Luffy during a particularly dangerous adventure. Maybe they get separated from the crew, and in the time they are alone, she sees a different side of Luffy and her feelings start to change.
Robin and Luffy have some great interactions in fanfiction. Luffy's silly antics can often make Robin laugh, which is a rare sight given her usually calm demeanor. For example, in some fanfics, Luffy might accidentally stumble upon Robin's reading corner and start asking her all sorts of curious questions about the books, leading to an endearing exchange between them.
In fanfiction, Robin and Luffy often share a unique bond. Luffy's carefree nature and Robin's mysterious side make for an interesting dynamic. Luffy's acceptance of Robin into the crew was a significant moment. Fanfic writers might explore how Robin, with her complex past, finds solace in Luffy's unwavering leadership and the Straw Hat crew's camaraderie.
One idea could be a story where Luffy, Nami and Robin get stranded on a mysterious island. Luffy is eager to explore, Nami is worried about resources and Robin is interested in the island's history. They work together, with Luffy's leadership, Nami's navigation skills and Robin's knowledge to survive and find a way off the island.
Yes, there are quite a few. Some fanfictions explore their relationship in really interesting ways. For example, in some, Nami's love for Luffy might start from his unwavering leadership and how he always protects her and the crew. It adds a new layer to their interactions on the ship.
For Luffy, he might develop a deeper understanding of history and knowledge through his interactions with Robin. He could become more patient when it comes to listening to Robin's long - winded explanations about ancient texts. For Robin, she could become more open and trusting of the crew, especially Luffy. His unwavering loyalty towards her could make her feel more at home on the ship.
Another idea is that they time travel to a random point in the past, like when Gol D. Roger was still alive. Luffy would be excited to meet the Pirate King. Roger might see something special in Luffy and give him some cryptic advice. Robin could ask Roger about the secrets he knew about the world's history. This encounter could have a huge impact on Luffy's journey and how he views his role as a pirate.
One common theme is adventure. Since they are part of the Straw Hat crew in One Piece, fanfictions often put them in new and exciting adventures together. Another theme is growth. Luffy and Robin both grow as characters, and fanfictions explore how they influence each other's growth. For example, Luffy's optimism might help Robin overcome her past traumas.
One possible plot could be that Robin discovers an ancient text that leads to a powerful and mysterious treasure. Luffy, being eager for adventure, decides they must go after it immediately. Along the way, they face various enemies and challenges. Robin uses her knowledge to decipher clues, and Luffy uses his strength to fight off foes. They might also meet some old friends from the Straw Hat crew who join them on this new quest, making the journey full of reunions and new memories.