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.
In this fanfiction, Naruto and Lightning could be brought together by a prophecy. The prophecy states that only the combination of the ninja from Naruto's world and the warrior from Final Fantasy can stop a great evil. They start on a journey filled with challenges. They face various monsters and obstacles, and during this time, Naruto teaches Lightning about the concept of chakra, while Lightning shows Naruto how to use some of the advanced technology in the Final Fantasy world.
The plot might involve Naruto being mistaken for an enemy in the Final Fantasy world at first. Lightning initially tries to fight him, but then they realize they have a common goal. For example, they both want to find a magical artifact that has the power to restore balance. Along the way, they learn from each other's fighting styles and develop a mutual respect.
Well, it could be about Naruto characters getting sucked into the world of Final Fantasy 8. Maybe Naruto could team up with Squall. They'd fight some of the FF8 monsters together, and Naruto could use his jutsus while Squall uses his gunblade. It'd be a really cool mix of the two universes.
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.
Well, it could be about Naruto discovering a new power related to lightning and becoming the so - called 'god of lightning'. Maybe he has to face a powerful enemy that can only be defeated with this newfound power.
Well, it could be about Naruto discovering a new way to master lightning - based jutsu. Maybe he meets a mysterious mentor who teaches him unique lightning techniques that are far more powerful than the ones he already knows.
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.
Perhaps in the fanfiction, the Akatsuki organization somehow gets hold of the power to summon Final Fantasy creatures. Naruto then has to figure out how they got this power and stop them. He might have to train hard to master the same summoning techniques. He could end up summoning a Shiva to counter the Akatsuki's Ifrit summon in a huge battle that shakes the very foundations of the ninja world.
One interesting plot could be that Naruto and his friends somehow get transported to the world of Final Fantasy 15. Naruto's ninja skills would be a huge asset in the new world. He could team up with Noctis and his crew to fight against a common enemy, like a powerful daemon that is causing chaos in both their worlds combined. Maybe Naruto could teach Noctis some of his chakra control techniques in exchange for learning some of the magic from Final Fantasy 15.
In this fanfiction, it could be that there is a prophecy that involves both Lulu and Naruto. The prophecy states that only by combining their powers can they save both their universes from a great evil. So, they meet and at first have communication problems due to their different backgrounds. However, as they train together and share their stories, they form a deep bond and work towards fulfilling the prophecy.
One possible plot twist could be that Naruto has a really hard time controlling the Lightning Armor at first. Instead of it enhancing his speed and power, it causes him to accidentally electrocute his friends. This would create a lot of tension and drama as he has to figure out how to master it without hurting those around him.