What are some interesting plot ideas for a Kingdom Hearts x oc fanfiction?

Perhaps the OC has a special power that is linked to Ventus' past in some way. For example, she can see glimpses of his forgotten memories. This leads to a journey where they explore his past together, while also growing closer and falling in love along the way. They might face challenges from Organization XIII who are interested in the OC's power.

Another interesting concept is an OC who is a member of an organization that opposes Organization XIII in a different way. Maybe they use magic that is not based on darkness or light, but something in between, which causes them to be shunned by both sides at first.

One idea could be creating an OC who is a keyblade wielder from a forgotten world. This OC could be on a quest to discover the secrets of their world's connection to the greater Kingdom Hearts universe. They might encounter classic characters like Sora and Riku and have to prove their worth as a keyblade wielder.

One idea could be that the main character from 'The Gamer' gains the power to level up in the 'Kingdom Hearts' world. So they start leveling up their keyblade skills like it's an RPG. They could also gain stats related to magic, speed, and strength, which would change how they interact with the Heartless and Nobodies.

Maybe there could be a story where the Keyblade wielders from Kingdom Hearts visit the world of FFXV to learn about their unique form of magic. They could then exchange knowledge, like how Noctis' warp strikes could be adapted into a new Keyblade ability.

One idea could be creating an OC who is a keyblade wielder from a forgotten world consumed by darkness. This OC could be on a journey to find a way to restore their world while also struggling with the allure of the darkness within them.

One idea could be exploring the backstories of the new characters introduced in Kingdom Hearts 3 in more depth. For example, you could write about how they came to be in the different worlds and what their true motives are.

A cool plot could be that a new villain emerges, who has the power to manipulate both time (like in Chrono Trigger) and hearts (like in Kingdom Hearts). The heroes from both universes have to combine their skills and knowledge. For example, Sora's ability to unlock hearts and Crono's time - manipulation skills could be used together to defeat this powerful foe. They would need to journey through various worlds from both franchises, facing challenges specific to each world's time and heart - related mysteries.

A common plot idea is the crossover of the magic systems. For example, how the magic from Twisted Wonderland would interact with the Keyblade magic in Kingdom Hearts. Maybe the characters from Twisted Wonderland could learn to use Keyblades or the Kingdom Hearts characters could adapt to the unique spells in Twisted Wonderland.

One idea could be that the reader is a new student at the Kingdom Hearts School. They're lost on their first day and a popular character from the series helps them find their way. This could start a friendship or even a budding romance.