Naruto would probably be very excited and curious about Lightning's world. He'd be constantly asking questions and might even try to use some of the Final Fantasy items in his own ninja - like way. Lightning, on the other hand, would be more reserved but gradually warm up to Naruto's energetic nature.
One possible plot could be that Naruto is somehow transported into the world of Final Fantasy. He meets Lightning and they team up to fight a common enemy. Maybe a powerful sorcerer who is threatening to destroy both their worlds. Naruto's ninja skills combined with Lightning's combat abilities would make for an interesting dynamic.
One great fanfiction idea could be that Hope, after growing stronger and more confident, becomes Lightning's equal in battle. They embark on a journey to discover a hidden power in the world of Final Fantasy 13. Along the way, they face numerous challenges that test their bond and their skills.
A fanfiction could focus on how Lightning and Vanille help each other heal from their past traumas. Lightning, who has always been a fighter, could learn from Vanille's more empathetic side. Vanille, in turn, could gain strength from Lightning's determination. They could share their memories and dreams, and perhaps form a deeper bond that goes beyond friendship.
The story focuses on Lightning, who has been awakened from crystal stasis to save the world from impending doom. She has a limited time to fulfill her mission as the world is set to end in thirteen days. She travels through different regions, facing various challenges and enemies, all while trying to uncover the mystery behind the world's end and find a way to save it.
The plot revolves around Lightning, who has been awakened from crystal stasis in a world that is about to end. She has 13 days to save as many souls as possible before the final day of reckoning. Along the way, she battles various foes, meets old friends and new characters, and tries to uncover the mysteries behind the world's impending doom.
He might use his ninja skills in a unique way. For example, his Shadow Clone Jutsu could be used for various tasks like exploring dungeons simultaneously or confusing the enemies in the Final Fantasy world which often have complex battle systems. Also, his Rasengan could be a powerful attack against the magical creatures there.
A possible plotline is that a new threat emerges in the world of Final Fantasy 13 that can only be defeated by a combined power of Hope and Lightning. However, they have some differences in their approaches to fighting, which they need to overcome. For example, Lightning is more impulsive while Hope likes to plan. They argue at first but then learn to work together effectively.
They could have a story where they swap roles. Vanille takes on a more leadership role, which is usually Lightning's territory, and Lightning has to learn to follow. This would be a great way to explore their characters in a different light.
He could fit in as a hero. Just like in his own world, he would fight against the evil forces in Final Fantasy. For instance, if there was a dark sorcerer threatening the land, Naruto would step up to protect the innocent. His ability to make friends easily would also help him gather allies from different parts of the Final Fantasy world.