Trafalgar Law is a rather complex character. In a possible love story, he might meet a kind - hearted pirate girl. She could be on a journey similar to his own. Law, initially cold - hearted, slowly warms up to her. They start sharing their dreams and past traumas. Their love story might unfold as they face dangerous enemies together, relying on each other's strength and slowly realizing their feelings for one another.
One common theme is Law's past. Writers often explore his time in the North Blue, his experiences with the Donquixote Pirates, and how those events shaped him. Another theme is his relationships, especially his interactions with the Straw Hat Pirates.
Well, a great plot could be that in a fanfiction, Law and Nami accidentally swap their abilities. Nami has Law's Ope - Ope no Mi powers and Law has Nami's Clima - Tact skills. They then have to learn how to use these new powers while also dealing with the chaos it causes on the ship. Also, perhaps there's a story where Nami gets sick and Law is the only one who can cure her, but he needs to find a very rare ingredient on an enemy - occupied island. Another one could be that they are on a mission together to steal a valuable jewel from a heavily guarded fortress and they plan an elaborate heist.
I think the most interesting part would be how his relationship affects his relationships with his crew. Law is a captain, and his decisions are important. If he falls in love, will he put his love's safety above his crew's at times? How will his crew react to his new relationship? Will they accept his lover? And how will his love story impact the overall dynamic of the Heart Pirates? These aspects would add a lot of depth and drama to the story.
Law's introverted and methodical personality might be intrigued by Nami's extroverted and spontaneous nature. In a fanfiction, Nami could drag Law into unexpected adventures, which he may not be used to but would learn to enjoy. At the same time, Law's knowledge of the world and his medical expertise could be of great help to Nami. For instance, when Nami gets injured during a fight, Law can patch her up. And their exchanges of ideas, with Law's more philosophical thoughts and Nami's practical viewpoints, can add depth to the story.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). There are often a large number of One Piece Trafalgar Law fanfictions there. Fanfiction.net is also a good place. Many writers share their creative works about Law on these platforms.
In a fan fiction, Law could be injured while trying to protect an innocent village from a tyrannical pirate. His injury is severe, and the villagers, in return for his selfless act, use their local knowledge of healing plants to nurse him back to health. This could lead to a beautiful bond between Law and the villagers, and also show a different side of Law's character.
If Law is injured, it could change his standing among other pirates. Some might see him as weakened and try to take advantage, while others might respect him more for still being a threat even when injured. This could lead to new alliances or rivalries. Also, his injury could make him more cautious in future battles, changing his overall fighting style.
The law is definitely not dead in One Piece. It exists in various forms and degrees, and its enforcement or violation drives many of the story arcs. The struggle against injustice and the search for true justice are ongoing themes related to the law within the manga.
One popular Trafalgar Law fanfiction could be those that explore his backstory in more depth. For example, a fanfic might focus on his time in the North Blue before joining the Shichibukai. Another type could be adventure - themed ones where Law teams up with other characters from 'One Piece' in new and exciting quests.