Nami could also be a common character. She might help Luffy manage the financial aspects of his admiral duties, as well as use her navigation skills to assist in any navy - related voyages. And of course, she'd be there to keep Luffy in check when he gets too carried away.
One common character paired with 'female Luffy' is Zoro. In some fanfictions, their relationship could be more of a romantic nature. Zoro might be the first one to notice the changes in Luffy when she reveals her female side, and then they start to develop a deeper connection. Their dynamic would be different from the original, with more of a romantic tension added to their usual banter.
Well, of course, Luffy is always one of the main characters. And then there's usually an admiral, like Akainu or Kizaru. They often start as antagonists to Luffy but then the story might develop their relationship in different ways.
Some fanfictions also pair Luffy with Hancock. Given Hancock's infatuation with Luffy in the original series, it's not a stretch to develop a full - blown love story. Her powerful status as a pirate empress and Luffy's carefree nature can create an interesting dynamic, with Hancock trying to win Luffy's heart while he is mostly oblivious to her romantic intentions.
Zoro is another popular character. He and Luffy have a strong bond, and in Gear 5 fanfiction, they might fight together in a new and more coordinated way. Zoro could be using his swordsmanship to complement Luffy's wild and unpredictable Gear 5 attacks, creating a powerful combination against their enemies.
One great 'luffy admiral fanfiction' could be the one where Luffy teams up with an admiral to face a common, extremely powerful enemy. It shows an unlikely alliance and how they overcome their differences in ideology to fight for the greater good.
One interesting plot could be Luffy in an alternate universe where he becomes an admiral earlier in his journey. He might use his unique leadership style and devil fruit powers in new ways to uphold the navy's justice while still maintaining his core values of freedom and friendship.
Aside from Luffy, characters like Ace might show up in this type of fanfiction. Ace, being Luffy's brother, could have some connection to Luffy's discovery of conquerer's haki, perhaps through memories or some form of spiritual guidance. Additionally, some powerful enemies might be present. These enemies would serve as the motivation for Luffy to quickly master the conqueror's haki in order to defeat them and protect his crew. There may also be some minor characters from the One Piece world who assist Luffy in his learning process, like the inhabitants of a special village that has knowledge about haki.
Well, one unique feature is the role - reversal or role - expansion. Luffy, who is known for his carefree pirate ways, is now in a position related to the admirals. It creates a contrast. For example, in some fics, he has to enforce laws which is completely different from his normal 'break - the - rules - to - do - what - is - right' attitude.
The theme of acceptance is quite common. Fem Luffy often has to be accepted by the other characters in the story. This could be because she's different due to her gender or her slightly different personality traits. Also, the theme of self - discovery is prevalent. As fem Luffy navigates the pirate world, she discovers more about herself, her abilities, and her place in the grand scheme of things.
Obviously, Luffy himself is the central character. But other characters like Nami often play important roles. In Smart Luffy fanfiction, Nami could be the one who helps Luffy understand complex concepts related to navigation or money management. Since Luffy is smart now, they might have more in - depth discussions about how to use their resources on the Grand Line.