There are fanfictions that might focus on the characters from both universes interacting in unexpected ways. Like, Riku meeting Luke Skywalker and learning about the Force from him while also teaching Luke about the power of the heart. This kind of crossover can lead to some really cool character development and plot twists.
Some fanfictions may explore what would happen if the Heartless invaded the Star Wars galaxy. The Star Wars characters would have to deal with this new threat that they've never seen before. They might need to team up with Kingdom Hearts characters to find a way to defeat the Heartless and protect their planets and systems. This could involve a lot of creative world - building and action - packed scenes.
The most interesting part is the crossover of characters. Seeing Sora interact with Luke Skywalker, for example, is really cool. They come from different universes with different powers and moral codes, but in the fanfiction, they can learn from each other.
One interesting 'Kingdom Hearts SoraNort' fanfiction could be about their unexpected alliance. Maybe Sora and Xehanort (Nort) have to team up against a greater evil that threatens all the worlds. In this fanfic, they could gradually understand each other's motives and pasts, leading to a complex relationship.
One interesting 'Kingdom Hearts lemon fanfiction' could be those that explore unique character relationships in the Kingdom Hearts universe. For example, some might focus on how different characters from different worlds interact on a more personal and emotional level, while still maintaining the essence of the Kingdom Hearts story. However, it's important to note that fanfictions like these might not be in line with the official canon of the game series.
One interesting 'Kingdom Hearts Vampire' fanfiction could be about a character from Kingdom Hearts being turned into a vampire and having to deal with new powers and a thirst for blood while still trying to fulfill their original quest. For example, Sora as a vampire might struggle to control his new urges while still fighting against the Heartless.
You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Use the search terms 'Star Wars Kingdom Hearts' to narrow down the results. Check the ratings and reviews of the fanfictions to see which ones are popular and well - liked.
One possible plot could be that Sora and his friends find themselves in the Star Wars universe. They team up with Luke Skywalker to fight against the Heartless that have somehow invaded the galaxy. Sora's Keyblade could be a unique weapon in this new setting, and they could learn about the Force while sharing their own knowledge of the Heart.
One good example could be a fanfic where the characters from Kingdom Hearts 3 end up in the Star Wars universe. They might interact with Jedi or Sith, like Sora trying to understand the Force. Another example could be a story where the Keyblade wielders team up with the Rebel Alliance to fight against the Galactic Empire. It could add an interesting dynamic to the Star Wars lore with the unique abilities of the Kingdom Hearts characters.
A common trope is the 'lost in a new world' trope. For instance, a Star Wars character could end up in the Kingdom Hearts universe and be completely bewildered by the different rules and magic there. Or vice versa, a Kingdom Hearts character in the Star Wars galaxy would be shocked by the technology and different cultures.
One interesting fanfiction could be 'Female Riku's Adventure in the Keyblade Wars'. It might explore how a female Riku would handle the complex politics and battles within the Kingdom Hearts universe. Another could be 'Female Riku and the Lost Hearts', where she goes on a journey to find and restore lost hearts in different worlds. There's also the possibility of a fanfiction like 'Female Riku's Bond with Sora', which delves into a unique friendship or more between them.
One interesting fanfiction could be about Sora and the Fairy Tail gang teaming up to fight a new, powerful dark force. It might have epic battles and cool magic combinations.