One popular fem Luffy and Ace fanfiction might be 'Sisterly Bonds'. It delves into their relationship with a new perspective of Luffy being female. It shows how their interactions change and yet still hold the essence of their brotherly (in this case, sisterly) love in the original story. Another could be 'Fem Luffy's Adventure with Ace', which focuses on their adventures together with a unique take on fem Luffy's character development in relation to Ace.
First, you need to really understand the characters of Luffy and Ace from the original One Piece. Think about how Luffy's character traits would be different or the same if she was female. For Ace, consider how his relationship with a female Luffy would develop. Then, come up with an interesting plot. It could be an adventure they go on together, or a situation where they have to face a common enemy. Also, don't forget to add some emotional depth to their relationship.
Well, 'Luffy and Ace: Unbreakable Ties' is a fanfiction that I really like. It focuses on their childhood memories and how those shaped their relationship as they grew up. There's also 'Ace and Luffy's Great Escape' which is full of action. It shows their cleverness in getting out of difficult situations. 'Luffy and Ace: The True Friendship' is a must - read too. It simply and effectively shows the depth of their friendship.
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.
One great 'Ace Protective of Luffy' fanfiction is 'The Unbreakable Bond'. In this fic, Ace is always on high alert to protect Luffy from any threats in the New World. He uses his fire powers in really creative ways to fend off enemies.
Well, one characteristic could be the focus on a more 'romantic' or 'intimate' relationship between Luffy and Ace, which is often not in line with the original platonic nature of their bond in the source material. However, this is a very controversial aspect as it goes against the typical portrayal of their brotherly relationship.
Character development is key. Fanfictions explore how Ace and Luffy grow under Garp's influence. Maybe Luffy becomes more disciplined in some stories, or Ace learns to be more open - hearted, all thanks to their interactions with Garp and each other.
One great 'Ace Sabo Luffy Fanfiction' is 'The Brothers' Bond'. It beautifully explores their relationship, showing how they support each other through various challenges. Another one is 'Sabo's Return'. It focuses on Sabo coming back into Luffy and Ace's lives and how they all readjust. There's also 'Ace and Luffy's Adventure', which takes the three on a fictional journey filled with action and heartwarming moments.
Fem Luffy in fanfiction with Whitebeard could lead to some unique character developments. Since Whitebeard is such a father - like figure in the One Piece universe, his relationship with fem Luffy could be even more complex. It could be a story of him seeing her as a daughter figure in a different light. Also, the interactions between fem Luffy and the other members of the Whitebeard Pirates would be different. They might be more protective of her or she could inspire them in new ways due to her different gender - related traits.
Fem Luffy would probably bring a lot of energy. She might be more empathetic in some ways compared to the original Luffy, which could help in resolving internal crew conflicts. For example, if two crewmates have a disagreement, she could use her charm and understanding to smooth things over.