Well, in such fanfiction, Luffy's character often becomes more aware of his emotions. Usually, he is so focused on adventure and being the Pirate King, but when he falls in love, he starts to think about someone else's feelings. For example, he might be more hesitant to go on extremely dangerous adventures without considering how his loved one would feel.
In fanfiction, Luffy's character in Gear 5 might develop a greater sense of responsibility. Since Gear 5 is so powerful, he realizes he has to be more careful about using it. For example, he might avoid using it in areas where there are a lot of innocent bystanders.
Luffy's character would likely become more mature. He'd learn discipline from Whitebeard's strict training regime. His view of the pirate world might expand as he gets insights from Whitebeard's long - standing experience.
In Luffy harem fanfiction, his relationships often start from friendship. Since Luffy is a friendly and open - hearted character, the female characters are first drawn to him as friends. For example, Nami might start as just a crewmate but gradually develop deeper feelings. His relationships develop as he goes through adventures together with them. They see his courage and selflessness, which makes them admire him more.
In some harem fanfictions, Luffy may develop more emotional intelligence. For example, he has to understand the feelings of the different girls in his harem. He might become more perceptive about relationships compared to his rather straightforward self in the original series.
Often, it starts with their mutual respect. Luffy respects Robin's intelligence and strength, and Robin respects Luffy's leadership and unwavering spirit. Their relationship then grows as they share adventures and overcome challenges together. For example, in many fanfictions, during a battle where Robin is in danger, Luffy's fierce determination to save her deepens their bond.
In these fanfictions, their relationship can develop through shared battles. When they fight side by side against tough opponents, they understand each other better and their trust deepens.
His leadership style could change significantly. In the original, he leads with his heart and by example, but in a dark fanfiction, he could be more of a dictator - like leader within his crew, making decisions without much input from others and demanding strict obedience. His goals might also shift from just finding the One Piece and having a grand adventure to seeking power for more self - centered reasons, like revenge or dominance.
First, Luffy's constant saving of Nami from danger makes her feel special. She starts to see him not just as a captain but as someone she can depend on in every aspect of life. Nami, on the other hand, helps Luffy manage the crew's finances and gives him valuable advice. This back - and - forth exchange of support and care slowly blossoms into love. In the fanfiction, there could be moments like a romantic night on a deserted island where they finally confess their feelings. And after that, they decide to get married, with the crew being their biggest supporters.
Female Luffy may have a different body shape. Instead of the muscular build of the original Luffy, she could be more slender but still strong. Her hair might be styled differently too, maybe longer or in a different color. Also, her clothing choices could be more feminine while still maintaining the pirate - like style.
Luffy being raised by Doflamingo would be a radical departure from his normal upbringing. Doflamingo's way of life, which involves a lot of underhanded tactics and a disregard for the well - being of others, would shape Luffy in a very different way. He may not have the same innocent and carefree attitude. His goals could be more self - centered, like taking over territories or amassing power for the sake of it. His relationships would also be different. Instead of forming deep bonds of friendship, he might form alliances based on power and convenience. And his approach to challenges would be more in line with Doflamingo's cut - throat style, rather than his own original tenacious but more morally - guided approach.