Power dynamics play a part too. Luffy has his own unique powers as a rubber man and Charlotte has her own abilities within the Charlotte family. How they use their powers in relation to each other, whether in cooperation or in conflict, can create really exciting storylines. Also, the themes of loyalty and betrayal that are common in the One Piece world often seep into luffy charlotte fanfictions, adding depth to the characters and the overall plot.
Perhaps in the fanfiction, Luffy marries a Charlotte because of a deal. Maybe to save his crew or to gain access to some important information or power. Initially, it's just a practical arrangement. But as they start living together and facing challenges side by side, they develop real feelings for each other. The story could also include how the other members of the Straw Hat Pirates and the Charlotte family react to this union. Some might be supportive, while others might be skeptical at first but later come around as they see how happy Luffy and the Charlotte are together.
One possible plot could be that Luffy somehow ends up in the Charlotte family's territory. He might be intrigued by their unique devil fruit powers and food - based abilities. He could start making friends or rivals within the family, and his carefree nature might disrupt the family's more traditional and hierarchical structure.
I'm not sure about a specific 'luffy is a charlotte fanfiction' to recommend. You could try searching on fanfiction platforms like Archive of Our Own or FanFiction.net. They usually have a wide range of fanfictions and you might be able to find one that suits your taste there.
One great luffy charlotte fanfiction is 'The Unlikely Alliance'. It shows an interesting scenario where Luffy and Charlotte form an alliance against a common enemy. Their different personalities create a lot of fun and tense moments in the story.
The shared adventures are really important. When they travel to different islands together, they experience new things. Maybe Nami gets scared in a spooky forest and Luffy holds her hand to comfort her. Also, the contrast between Luffy's carefree attitude and Nami's more practical side can create interesting situations that lead to love. For instance, when planning how to get treasure, their different approaches can bring them closer.
Charlotte Pudding could be a likely candidate. She has a complex personality. She's initially deceptive but later shows her true self. Luffy might be attracted to her vulnerability and the good side of her that emerges. And Pudding could be drawn to Luffy's honesty and his ability to see the best in people.
Another key element could be the people around them. Maybe Charlotte and her partner had friends or family who supported their relationship. Or perhaps they had to overcome some opposition from others, which made their love story more dramatic and interesting.
One key element is their royal status. As Queen and King, their love was shaped by the expectations and duties of the monarchy. Another is their family. Having a large number of children was an important part of their relationship. Also, the political environment in which they lived influenced their love story as they had to make decisions together for the good of the kingdom.
One key element is her marriage to King George III. It was a union that had far - reaching political implications.
The key elements are Shanks, the straw hat, and the Gomu Gomu no Mi. Shanks was an important figure in Luffy's life. The straw hat he got from Shanks is a symbol of their connection and Luffy's journey. And the Devil Fruit gave him his special abilities.