A third theme could be facing greater challenges. In these fanfictions, the challenges are so big that Luffy can't just rely on his normal, laid - back self. He has to be more serious to overcome them.
One great 'luffy gets serious' fanfiction is 'The Serious Luffy Adventure'. In it, Luffy faces a powerful new enemy that forces him to drop his usual carefree attitude and strategize. It shows a different side of Luffy's character.
Rayleigh would be a great candidate. He's an experienced pirate and has already trained Luffy for a while. He has a lot of knowledge about the world of pirates and could give Luffy a talk about the deeper secrets of the Grand Line or how to deal with the powerful enemies that lie ahead.
It could be about Luffy having an important conversation. Maybe it's about his dreams, his crew, or some kind of revelation he has. Without reading it, it's hard to say exactly.
I'm not sure if there is such a specific fanfiction. There are a vast number of fanfictions out there, but this particular concept might be quite rare or not in line with the general tone of the 'One Piece' series. Fanfiction often explores different relationships and scenarios, but this one seems rather out - of - the - ordinary considering the nature of the characters in the original work.
A third theme could be self - discovery. As Natsu gets serious, he may also discover new aspects of himself. Maybe he realizes he has more power within him than he thought, or he discovers a different way of thinking about his role as a dragon slayer. This can lead to some interesting character arcs in the fanfiction.
In this fanfiction, Luffy might be used as a bargaining chip by his captors. Maybe they'll try to exchange him for something valuable, like a powerful Devil Fruit or a large amount of treasure. His crew would then surely launch a rescue mission, facing many challenges along the way.
One great serious Luffy fanfiction could be those that explore his backstory in more depth. For example, a fanfiction might focus on his early days in Foosha Village and how he dealt with the absence of his parents. Another could be about Luffy's training with Rayleigh during the two - year time skip, showing his struggles and growth in a more detailed and serious manner.
Well, in such fanfiction, the storylines often delve deeper into the complex themes of the original 'Harry Potter' series. For example, they might explore the moral ambiguities of magic more thoroughly. It could also focus on the psychological development of the characters, showing how they grow and change in ways that the original might not have fully explored. Additionally, the fanfiction might expand on the relationships between characters, like a more in - depth look at the friendship between Harry, Hermione, and Ron, or the complex family dynamics of the Weasleys.