The plot could start with some small hints that Luffy is a girl, like when she has to deal with certain situations that are more related to female physiology in private. As the story progresses, her secret might be gradually revealed to some of her closer crewmates.
The plot might involve Luffy having to prove herself not only as a pirate but also as a female pirate. She could face discrimination from other pirates or even some authorities. But she overcomes these challenges with her determination and the support of her crew. As the story unfolds, her secret could also bring new allies who are inspired by her courage as a female pirate.
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.
The plot could also involve Ed using her new - found female identity to her advantage in some situations. For example, in a world where people might underestimate a girl in alchemy, she could surprise them with her skills. Or she could use her femininity to gain access to certain places or information that were previously unavailable to her as a boy. This could create all sorts of interesting twists and turns in the story as she navigates the world of alchemy with this secret identity.
Luffy would likely develop a more responsible side. He'd start to think about protecting not just his crew but also his unborn child and Hancock. Hancock, on the other hand, would become more tender and less of the cold - hearted pirate she was before. She'd focus on the well - being of the baby and her relationship with Luffy.
The relationship between Luffy and Carina could start with Carina being intrigued by Luffy's unique personality and his determination to become the Pirate King. Luffy, in turn, would be interested in Carina's knowledge of treasures. Nami would be in the middle, initially skeptical of Carina but as she sees Carina helping the crew in treasure - related matters and fitting in well with Luffy's adventurous spirit, their relationships would grow deeper and more trusting.
At first, Mihawk might see female Luffy as just another brash young pirate. But as he witnesses her selfless acts for her crew and her unwavering will, he begins to soften towards her. Meanwhile, female Luffy is constantly trying to break through Mihawk's cold exterior. Their relationship develops as they learn more about each other's pasts and what drives them. For example, when Mihawk reveals his own journey to become the world's greatest swordsman, female Luffy can relate it to her own dream of becoming the Pirate King. This shared understanding brings them closer and they form an unlikely bond that is a mix of mentorship and friendship.
One interesting idea could be how Luffy's friends react when they find out. Maybe they are shocked at first but then quickly accept it and support Luffy as always.
The plot could develop with Natsu and the girl initially in shock. Then they might start making plans for the future, like finding a place to live. Natsu could also try to earn more money for the upcoming baby. Their friends would likely get involved, some offering help and others maybe being a bit skeptical.
Well, perhaps in the fanfiction, they marry secretly due to some unexpected events on a strange land. For example, they might have to get married to save the local people from a certain rule. After that, they struggle to maintain their secret. Nami might be worried about how the crew will view her relationship with Luffy, especially considering Luffy's role as the captain. And Luffy, being Luffy, might not fully understand the implications of a secret marriage at first, which could lead to all sorts of misunderstandings and interesting plot developments as they journey on with the Straw Hat crew.
Well, perhaps in the fanfiction, Vivi realizes her love for Luffy when she sees how he is always so determined to protect his friends and the people he cares about. Luffy, on the other hand, might fall for Vivi's kind heart and her loyalty to her kingdom. They keep their love a secret because they don't want to disrupt the harmony of the crew. And they communicate their feelings through little gestures, like Vivi making Luffy's favorite food or Luffy giving Vivi small treasures he finds during their travels.
At first, male Hancock might be a bit dismissive of female Luffy. But as he sees her in action, facing challenges head - on and never giving up, he starts to respect her. Luffy, being the friendly and open - minded person she is, would gradually break down Hancock's walls. They would develop a deep bond based on trust, with Hancock protecting Luffy when needed and Luffy inspiring Hancock to be more adventurous.