Some Tumblr blogs are dedicated to sharing and discussing Caitlyn and Vi fanfiction. You can search for relevant tags like #CaitlynandVi or #CaitlynViFanfiction and you might find some great stories or even get recommendations from other fans.
Fanfiction.net is also a good place. There are many different stories about them there. However, the quality may vary, so you might need to do some sorting. But it's definitely worth checking out.
Romance is also a very popular theme. Given their relationship in the Arcane series, fanfiction writers like to explore the romantic aspect between them. This can range from a slow - burning love story to more passionate and intense relationships. Some fanfictions focus on how they overcome their differences and fall in love.
One great Caitlyn and Vi fanfiction could be 'The Reconciliation'. It focuses on their relationship after a big fight in Piltover. The story shows how they overcome their differences and work together again.
One idea could be a story where Vi and Caitlyn have to team up to solve a mystery in the undercity that's been causing chaos. They start off with their differences but gradually learn to trust and rely on each other more as they dig deeper into the case.
The story of Caitlyn and Vi in the comic is full of action and adventure. They team up to fight crime and protect their city from various villains.
A common theme is also the exploration of their backstories. How Vi grew up in the undercity and Caitlyn in Piltover, and how these different backgrounds shape their characters and interactions. Some fanfics also focus on the power dynamics between them, considering their different skills and positions in society.
One common theme is friendship development. Since they come from different backgrounds in the Arcane universe, their journey to becoming friends or even closer is often explored.
A great fanfiction idea is one that delves into their relationship dynamics. For example, how they deal with their differences in social status. Caitlyn being from the upper class of Piltover and Vi from the undercity. It could show how they overcome these barriers and grow closer through shared experiences and mutual respect.
There's also 'Vi and Caitlyn: A New Beginning'. This fanfiction focuses on how they might start to build a life together after the chaos in Piltover. It has some really sweet moments between the two characters.
This kind of comic usually involves adult and inappropriate content. It's not something that's considered appropriate or mainstream.