In Robin and Luffy time travel fanfiction, a frequently seen theme is the exploration of history. Since they are time traveling, they get to see the One Piece world's past up close, which includes things like the origin of devil fruits or the history of certain kingdoms. Another theme is the strengthening of their bond. Through facing different challenges in different time periods together, their friendship and trust in each other grow even deeper. And of course, the theme of destiny also often appears. They might question if their time travel was fated and what role they are supposed to play in the different timelines.
I recommend the novel One Piece Montage to you. The male protagonist transmigrated to the world of One Piece. In the process of becoming a Luffy crew member, he met Robin and gradually fell in love with her. There were two mysterious powers in his body. One was the energy source in his body, and the other was a treasure from time and space. By searching for treasures and activating energy sources, the male protagonist moved towards his goal of saving the world and being with Robin. I hope you like this fairy's recommendation. Muah ~π
The appeal lies in the unique combination of their characters. Luffy is all about freedom and adventure, while Robin is the intelligent and mysterious one. When Luffy is godlike, it adds a new dimension to their relationship. Fans love to see how Robin would react to an even more powerful Luffy and how they would interact in different situations.
One interesting plotline could be Luffy achieving a new level of power, like a godlike state, and Robin being the first to truly understand the implications of it. This could lead to them going on a journey to uncover secrets about the world that only Luffy's new power can access.
Another idea is that they are separated from the rest of the Straw Hat crew. In this situation, Luffy and Robin rely on each other more than ever. They travel through a dangerous area filled with strange creatures. Luffy protects Robin from the physical threats, and Robin uses her skills to find food and shelter. Along the way, they have deep conversations that strengthen their bond as nakama.
Their relationship could develop in a more academic way. Since Robin loves knowledge, she might start teaching Luffy about the history of the world. Luffy, being curious, would listen intently and ask simple but profound questions. This would make Robin see Luffy in a new light, not just as a captain but as someone with a thirst for knowledge as well.
Perhaps the baby could have a special role in the future of the Straw Hat Pirates. It could be seen as a symbol of hope and new beginnings for the crew. The baby might grow up to be a great navigator or fighter, adding to the strength of the crew. And the relationship between Luffy and Robin would evolve as they become parents, sharing more tender and responsible moments.
One great Robin and Luffy time travel fanfiction is 'Time - Twisted Adventures'. It has an interesting plot where Luffy and Robin get sent back in time and have to figure out how to get back to their own era while also changing some key events in the past. Another is 'Time Travelers of the Straw Hats' which focuses on how their time travel affects the relationships within the crew in unexpected ways.
Well, perhaps a plotline where Luffy and Robin accidentally get trapped in a magical or mysterious place. While trying to find a way out, they grow closer and their hidden feelings start to surface. They have to rely on each other more than ever, and they share secrets and dreams that they haven't told anyone else in the crew. But when they finally get out, they have to go back to keeping their relationship a secret because they are not sure how the crew will react. There could also be a sub - plot where other characters start to suspect something but can't quite put their finger on it.
Yes, it can be quite popular. The idea of Luffy and Robin having a secret love is an interesting concept that adds a new layer of depth to their relationship. Many fans enjoy exploring the potential romantic aspects between different characters in the One Piece world. It allows for creative interpretations of their personalities and how they might interact in a more intimate way.