Survival is also a big theme. Given that they are usually set in a dangerous, post - apocalyptic world, they have to rely on each other to survive. This theme helps to build their relationship as they face threats from zombies or other villains.
There's also 'A New Alliance'. In this fanfiction, the merchant has some secrets that Leon gradually discovers. It's a great read as it shows a different side of both characters and how their relationship evolves in a post - apocalyptic world. The writer does a wonderful job of creating tension and chemistry between them.
There could be a 'leon x merchant fanfic' where the merchant has a special item that Leon needs to complete his mission. Leon offers to protect the merchant in exchange for the item. As they travel, they start to understand each other's motives and a bond forms between them. It shows how two different characters from different worlds can come together.
First, think about the personalities of Leon and the merchant. Leon could be brave and impulsive, while the merchant is shrewd and cautious. Then, create a plot. It could start with a chance encounter, like Leon needing something from the merchant's store. Next, build their relationship gradually, adding conflict and resolution. For example, they might disagree on a trade deal at first but later find common ground.
I'm not sure about a specific one off the top of my head. But you can check out some popular fanfiction websites. They usually have a search function where you can type in 'leon x mr x' and browse through the results. Look for ones with high ratings and lots of reviews.
Hunnigan could be a great addition. She could provide Leon with information and support from the outside, and her presence could add some tension as she might be suspicious of Ada's motives. Another good character is Wesker. His past connection to Ada could create more drama and conflict in the story. He could be a shadowy figure trying to manipulate the situation between Leon and Ada.
One common theme is friendship. They often start from different backgrounds or even with some animosity, but gradually become friends through shared experiences.
Romance is also a big theme. Writers like to develop a romantic relationship between them, showing how their feelings for each other might have grown during their time together in the game's story. They might write about secret glances and unspoken feelings that gradually turn into love.
One common theme is adventure. Since both Leon and Sherry are characters from the Resident Evil universe which is full of danger and mystery, many fanfictions will have them go on adventures together, fighting against bio - horrors. Another theme is romance, of course. Writers like to explore the relationship between the two, how they might fall in love and support each other.
One main theme is friendship. Since they are both strong - willed characters from different universes, their friendship is often explored. Another theme is cooperation. They usually have to work together to face various challenges.