The most common theme is probably the transformation itself. Writers often focus on how Ace becoming female changes her perspective and the way she approaches life. Power and strength are also themes. Does being female affect her power? Some fanfictions show her having to prove herself more because of her gender. Also, loyalty. Her loyalty to her friends and crew remains a central theme, but it's often explored in new ways due to her new identity as a female in these fanfictions.
One possible plot could be Ace, now female, joining the Whitebeard Pirates in a different way. Maybe she has to prove herself even more as a female in the male - dominated pirate world. She could face unique challenges and form different relationships with the crew members, like having a more sisterly bond with some of the younger pirates.
One great Portgas D Ace x Reader fanfiction is 'A Bond Beyond Flames'. It beautifully captures Ace's adventurous spirit and how he forms a deep connection with the reader. The story is filled with action-packed scenes on the high seas and tender moments between the two characters.
One common theme is his relationship with his brothers, Luffy and Sabo. There are many fanfictions that explore their childhood memories and how their bond has influenced Ace's life. Another theme is Ace's time in the Whitebeard Pirates. Fanfictions often focus on his interactions with his crewmates and how he grew as a person there.
Emotional depth is another important aspect. Since Ace has such a complex backstory and relationships, a good fanfiction will explore his emotions. It could be his feelings towards his brothers, his crewmates, or his own identity as a pirate and the son of Gol D. Roger. Also, world - building, if the story takes place in a new location or expands on the One Piece world, should be believable and add to the overall story.
There's also 'Naruto and Ace: Cross - World Bonds'. This fanfiction focuses on the friendship that develops between Naruto and Ace when they meet in a strange in - between world. It delves deep into their personalities and how they learn from each other. For example, Naruto teaches Ace about the importance of having a strong will in a different way than what Ace is used to in the One Piece world.
In the realm of 'female Portgas D Ace fanfiction', 'Ace: Reborn as a Female' stands out. This fanfic not only changes Ace's gender but also reimagines his entire backstory in a very creative way. It shows how his relationships, especially with Luffy and the Whitebeard pirates, would be different. Additionally, 'Female Ace: A Different Path' is also worth checking out. It takes the concept of a female Ace and creates a whole new narrative around her, exploring different character dynamics and story arcs.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). It has a large collection of fanfictions about various characters, including Portgas D Ace. Another good place is Fanfiction.net. Just use the search bar and type in 'Portgas D Ace' to find relevant stories.
A good Naruto and Portgas D. Ace fanfiction often has a well - thought - out plot that combines the elements of both universes in a believable way. For instance, how the chakra system in Naruto might interact with the devil fruits in One Piece.
One great 'portgas d ace crossover fanfiction' is 'Ace in Another World'. It has an interesting plot where Ace is transported to a different universe and has to adapt. The story does a wonderful job of maintaining Ace's character while introducing new and exciting elements.