What are some interesting concepts in Kingdom Hearts x Final Fantasy x Fanfiction?

Friendship and loyalty are also prevalent themes. In Final Fantasy XV, Noctis and his friends are deeply loyal to one another, and in Kingdom Hearts, Sora's relationships with Donald, Goofy, and his other friends are central. Fanfictions often explore how characters from both series would bond over these shared values.

Sora and Cloud are quite popular. Sora's cheerful and determined personality combined with Cloud's brooding and powerful presence make for interesting interactions. They can be portrayed as allies, learning from each other's fighting styles, or even as rivals in some fanfictions.

A great aspect of a Final Fantasy 10 and Kingdom Hearts fanfiction crossover could be the character relationships. Yuna and Sora, for instance, could form an interesting friendship. Yuna's calm and spiritual nature might contrast and complement Sora's more impulsive and adventurous side. They could learn from each other's experiences, with Yuna teaching Sora about the summoning and the fayth, while Sora shows Yuna the power of the Keyblade and the importance of believing in oneself in the face of great evil.

One interesting concept could be the combination of Naruto's ninja abilities with the job classes in Final Fantasy 14. For example, a character from Naruto might take on the role of a Black Mage in FF14, using their chakra in a way similar to how a Black Mage uses mana. Another concept could be the interaction between the different worlds. Maybe the Hidden Villages could exist in the same universe as Eorzea, and there could be diplomatic relations or even battles between the two. Also, the idea of characters from FF14 learning ninja techniques from Naruto characters would be really cool.

Some interesting concepts include alternate universes where the characters have different roles or relationships. For example, Sora might be a villain instead of a hero. Another concept could be exploring the backstories of minor characters in more depth, like how they came to be in the different worlds.

One interesting story could be about the characters exploring a new, mysterious world not in the original game. It might have unique Heartless and Nobodies with new abilities. The writer could focus on the relationships between Sora and his friends, like how they support each other in this strange new setting.

One popular 'Final Fantasy XV x Kingdom Hearts' fanfiction might be those that explore the crossover of the unique magic systems from both universes. For example, how the Keyblade from Kingdom Hearts could interact with the magic and weapons in Final Fantasy XV.

In Kingdom Hearts Darkness fanfiction, there are often concepts related to the origin of the darkness. Some stories might explore whether the darkness was always there or if it was created by some ancient force. There could also be the idea of a character having to master the darkness instead of simply fighting against it, like using the power of darkness in a controlled way to fight even greater threats in the Kingdom Hearts cosmos.

One interesting concept could be the exploration of the darker sides of the characters. For example, seeing how Sora might struggle with darker impulses or a corrupted Keyblade. Another could be alternate universes where the Heartless have completely overrun the worlds and the heroes have to fight in much more dire circumstances.

One interesting concept could be a new original character (OC) with a unique Keyblade design. For example, an OC whose Keyblade is shaped like a musical instrument, representing their love for music and how it ties into the power of the Keyblade. This could add a fresh dynamic to the battles and interactions in the Kingdom Hearts 3 universe.