One common theme is rivalry. Since they are often opponents in the game, this rivalry can be explored in different ways in fanfiction, like a friendly competition or a more intense, grudging rivalry that might turn into respect or even friendship.
Love is a very common theme. Writers often explore the romantic relationship between Kazuya Shibuya and the oc. Another common theme is friendship. Sometimes they start as friends and then the relationship evolves.
The theme of rivalry also exists in some fanfictions. While they are friends and teammates, there can be a friendly rivalry between them. This rivalry can be in terms of who is a better pitcher or catcher, or who can contribute more to the team. It adds an interesting dynamic to the stories and shows different aspects of their relationship.
Sure. You can try looking on fanfiction.net. There are often many works in the fighting game fanfic sections that might feature Kazuya and Lee. Just use the search bar there to find relevant stories.
The theme of mutual respect is prevalent too. They come from different villages with different values, but in the fanfictions, they gradually respect each other's ways and grow together as a result.
Friendship is a very common theme. Stories often explore how Eddy and Lee support each other through thick and thin.
Love, either platonic or romantic, is also a frequent theme. Sometimes it's a slow - burn type of love where they don't realize their feelings for a long time. Other times it's a more immediate connection that they have to navigate through various obstacles in the story.
One common theme is friendship evolving into something deeper. Since they start as comrades and rivals, many fanfictions explore how that relationship can transform over time.
A common theme is mentorship. Lee acts as a mentor to Clementine in the original story, and this is often explored further in fanfiction. For example, how he teaches her survival skills and moral values. Another theme is family - like bond. They form a close connection that resembles a father - daughter relationship in many stories.
A common theme is friendship turned into something deeper. They start as comrades, but as they understand each other more, it might develop into a romantic relationship. Another theme is mutual respect. Naruto respects Lee's hard work and Lee respects Naruto's spirit.
The theme of redemption also appears sometimes. Gaara's past actions and his journey to redemption can be intertwined with his relationship with Lee. Lee's positive influence on Gaara and vice versa, in terms of helping each other grow and become better shinobi, is a common thread in these fanfictions.