Kuina passed away in the manga because of a fatal stumble. This incident left a lasting impression and influenced the plot and characters' developments.
In a Mihawk x Zoro fanfic, the relationship could be developed in various ways. For example, they could train together, leading to exchanges of swordsmanship knowledge. This could be a great opportunity to delve deeper into their individual fighting styles and how they might influence each other. Also, the power dynamics between them would be a key aspect, as Mihawk is one of the strongest swordsmen and Zoro is determined to reach that level.
In zoro x sanji fanfics, one of the main things is the focus on their character development in relation to each other. They are both strong - willed characters, and fanfics show how they can grow and change because of their interactions. Also, many of these fanfics tend to set up unique scenarios for them. For example, they might be stranded together on an island, forcing them to rely on each other more than usual. This helps to bring out different aspects of their relationship that we don't always see in the main story. And the humor aspect is also quite prevalent. Their banter and arguments can be a source of great comedic moments in these fanfics.
I would recommend 'Three Souls, One Dream'. It has an interesting take on their interactions, showing how Zoro, Luffy, and Sanji grow together as a team. It has some really heartwarming moments that capture the essence of their friendship.
Their relationship in the Zoro x Sanji Christmas fanfic could be presented through a series of challenges and reconciliations. For instance, when they are tasked with getting a Christmas tree for the ship. Zoro wants to just chop down the first tree he sees, but Sanji has very specific requirements. They argue, but then realize that by combining their ideas, they can get the perfect tree. This pattern of arguing and then coming together could be repeated throughout the Christmas celebration, showing the complexity and depth of their relationship.
One character that would fit well is Robin. Her knowledge of the world and its secrets could be relevant if there's some mystery involved in the Zoro - Mihawk relationship. Brook, with his unique personality and his own skills as a swordsman, could also be included. He could have some interesting conversations with Zoro and Mihawk about swordsmanship. And Shanks, as a great swordsman himself and a significant figure in the One Piece world, could potentially play a role in the story, perhaps as an old acquaintance of Mihawk.
The chemistry between them. Luffy's carefree and determined nature, Zoro's cool and strong - willed self, and Sanji's passionate and sometimes flirty character create a really interesting mix. When they interact in a fanfic, it can lead to some really fun and engaging moments.
Another theme is rivalry. Zoro and Sanji have a friendly rivalry which can be elaborated on in fanfictions. For instance, they might compete in a friendly tournament on the ship to see who is stronger or more useful in a certain situation.
One common theme is the exploration of their different personalities. Law is more calculating and reserved while Zoro is straightforward and brash. Fanfics often play with how these two personalities clash and then find harmony.