The theme of friendship evolving into something more is also quite popular. It starts with their strong friendship as comrades in the fight against bio - threats, and then it gradually develops into a deeper, more romantic or at least more intimate relationship as the story progresses.
Another theme is the unspoken or developing romance. Since their relationship in the games has undertones of a deeper connection, fanfictions often build on that. They might write about the moments when they first realize their feelings for each other, like a shared look during a tense battle or a quiet conversation after a difficult mission.
One great fanfiction could be 'Bond Beyond Duty'. It delves deep into the relationship between Chris and Piers during a new mission. It shows how their trust in each other grows in the face of new threats in the Resident Evil world.
You can start by searching on fanfiction websites like Archive of Our Own or FanFiction.net. Just type in 'Resident Evil Chris x Piers' in the search bar, and a bunch of relevant stories will pop up.
Fanfiction.net also has a good selection. You could look for ones that explore their relationship in different ways. For example, there might be stories that are set in an alternate universe where they meet under different circumstances than in the game, and it changes how their relationship develops.
Friendship is a big theme. The deep bond between Chris and Piers is a great foundation for fanfiction. Many stories show how their friendship endures through difficult times. Also, the theme of heroism comes up a lot. They are both heroic characters, and fanfiction often expands on that aspect of their relationship.
Survival is a very common theme. Since Resident Evil is about surviving in a world full of bio - horrors, when crossed over with other universes, the characters often have to adapt and survive in new and even more dangerous situations.
Survival is a very common theme. Just like in the original 'Resident Evil 2', when characters from different universes cross over, they still have to fight to survive the zombie - infested Raccoon City or deal with the bio - weapons.
One common theme is survival. Female characters often have to fight for their lives against the various bio - threats in the Resident Evil universe. Another theme is empowerment. They show that women can be just as tough and resourceful as men in these terrifying situations.
The theme of redemption often pops up too. Maybe a character from another franchise who has made mistakes in their own world gets a chance to redeem themselves in the Resident Evil 6 crossover. Or a Resident Evil character has a chance to make up for past failures by working with new allies from the crossover. It adds depth to the characters and the overall story.
Survival is a common theme. Whether it's crossing over with another survival - horror franchise or a more action - oriented one, the characters are often faced with new threats and have to find ways to stay alive in the Resident Evil 5 crossover fanfiction. For example, when crossed with a post - apocalyptic world like in Fallout, they need to find resources and shelter while fighting off the Resident Evil enemies.