There's also 'Ada and Leon: Shadows of Raccoon City'. This fanfic takes place after the events in Raccoon City. It shows how their paths cross again and how they deal with the lingering traumas from that time while still being drawn to each other. It's a really engaging read as it adds new layers to their relationship.
Good character development makes a great Ada Wong and Leon fanfic. Writers need to stay true to their personalities. Leon's sense of justice and Ada's mysterious allure should be well - presented. Also, an exciting plot is key. Whether it's a new bio - horror threat or a complex political conspiracy, it should keep readers on the edge of their seats.
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.
You can start by looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just type in 'Ada Wong and Leon' in the search bar, and a whole list of relevant fanfictions will come up. AO3 has a great tagging system which makes it easier to find specific types of stories, like ones focused on their relationship or action - packed adventures they might have together.
One possible plotline could be Ada and Leon teaming up against a new bio - terrorist threat. They might start off distrusting each other as in their previous encounters, but gradually learn to rely on one another. Another could be a story set in a post - apocalyptic world where they are the only two left with the skills to fight off the mutated creatures. Maybe there's a love story woven in between their dangerous missions, where they struggle with their feelings for each other while trying to survive.
One common theme is the unspoken attraction between them. Their relationship in the games is full of mystery and tension, and fanfiction often delves deeper into that.
I really like 'A New Beginning' in the 'leon kennedy x claire redfield fanfiction' genre. It starts with them meeting in an unexpected situation and then gradually shows how their relationship deepens. The action scenes are well - integrated with their growing connection, making it an exciting read.
One common theme is survival. Given their world in Resident Evil, they often have to fight to survive together, which brings them closer. Another theme is mutual trust. They trust each other with their lives, and this is often explored in the fanfictions.
Well, a plot could revolve around Ada getting injured and Leon having to take care of her in a safe house. During her recovery, they have long conversations about their lives, their choices, and their feelings for each other. It could be a time when they really open up to one another and start to see a future together that they never thought possible before.