Friendship is a very common theme. Sanji and Luffy have a strong bond, and in fanfictions, this bond is often explored in different situations, like during battles or when they face hardships on their journey.
Adventure is also a popular theme. Since they are pirates, fanfictions often take them on new and exciting adventures. These adventures can test their relationship, strengthen it, and also lead to new discoveries about each other. It's a great way to explore their characters further while keeping the spirit of the original story alive.
Growth is also a theme. They both grow as characters in the original story, and in fanfiction, it can be shown in unique ways. For example, Sanji might learn something from Luffy about leadership, and Luffy might learn about the importance of good food from Sanji, and these learnings can be part of a more complex character - development arc within the fanfiction.
One common theme is the exploration of their unique relationship dynamics. Sanji's often - flamboyant and protective nature towards Luffy is often emphasized. Another theme is the idea of loyalty in a more romantic or intimate context. Since they are crewmates in the original story, the fanfiction might play with how that loyalty translates into a different kind of bond.
One common theme is friendship. Sanji and Luffy have a strong bond in the original series, and in fanfics, this bond is often explored more deeply, sometimes in a way that blurs the line into a more affectionate relationship. Another theme could be adventure. They might go on new and unique adventures together that are not part of the original story.
Another theme is rivalry. Zoro and Sanji have a friendly rivalry which can be elaborated on in fanfictions. For instance, they might compete in a friendly tournament on the ship to see who is stronger or more useful in a certain situation.
One common theme is their friendship. They are all part of the Straw Hat crew and fanfictions often explore how their different personalities interact and support each other. For example, how Zoro's stoicism and loyalty play off against Luffy's carefree leadership and Sanji's chivalry.
A common theme is rivalry - turned - friendship. They start off constantly at odds in the original story, and in fanfictions, this often evolves into a deeper connection. For example, in many, they learn to respect each other's skills more.
One common theme is friendship development. Since they have different personalities, seeing how they become closer and understand each other better is often explored. For example, Sanji's chivalry and Usopp's cowardice at times can create interesting dynamics as they learn to accept and support each other.
One common theme is the discovery of hidden depths in each other. Sanji, known for his chivalry, discovers Robin's more complex and mysterious side, and Robin gets to see beyond Sanji's flirty exterior. Another theme is mutual respect. They both respect each other's skills and intelligence.
One common theme is unrequited love at the start. Often, Sanji has strong feelings for Nami while she is initially oblivious or not fully receptive. Another theme is the idea of protection. Sanji is always eager to protect Nami, whether it's from other pirates or just general dangers. For example, in many fanfictions, when the crew is in a fight, Sanji will put himself in harm's way to keep Nami safe.
Another theme is mutual growth. They support each other's character development. Sanji might help Zoro become more in - touch with his emotions while Zoro could inspire Sanji to be stronger physically. This is often shown through different adventures and challenges they face together.