Sasuke could be a more complex addition. He might start off as an antagonist in the world of Final Fantasy 15, perhaps being interested in the power of the crystals for his own purposes. But as the story progresses, he could see the value in helping the people of Eos, just like he eventually came around to help protect the Hidden Leaf in Naruto. His sharingan abilities would add a new dimension to the battles in Final Fantasy 15.
Well, Naruto himself could fit in as a powerful ally. His speed and strength would be very useful in the battles against the daemons. He could also teach the characters in Final Fantasy 15 about perseverance and never giving up, which is a big part of his character. For instance, he could inspire Noctis to be more confident in his role as the king.
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.
In a fanfic, Naruto's godlike nature might make him a key figure in understanding the secrets of the Lifestream. He could use his chakra sensing abilities, which are enhanced in his godlike form, to explore the Lifestream in ways that the characters in FFVII can't. He might discover new aspects of the Lifestream that could be used to either stop or control Sephiroth. This would add a new layer of mystery and power to the story.
He would fit in as a very powerful and unique character. His godlike powers would make him stand out among the other characters in the harem and in the Final Fantasy - inspired world.
They could be brought into the world through a magical portal. Naruto's energy and positive attitude would be a contrast to the often - darker tone of FF7. Gaara, with his calm and powerful presence, could be seen as an ally by some of the FF7 characters. They might start by helping the people of Midgar, using their ninja skills to deal with the Shinra soldiers or the various monsters that lurk in the slums.
The characters from Final Fantasy would bring their unique skills and personalities. For instance, Tidus from Final Fantasy X with his blitzball skills could be like a new form of entertainment in Westeros. His positive and somewhat naive personality might make him an easy target for some of the more cunning characters at first. But his determination and fighting skills would also earn him respect. He could get involved in local disputes and use his skills to help those in need, while also trying to understand the complex power dynamics of the Seven Kingdoms.
Naruto could use his ninjutsu against the zombies. His Rasengan would be very effective in taking out groups of zombies at once. He could also use his chakra to enhance his physical abilities and jump over hordes of zombies.
Naruto characters could fit in by bringing their unique powers. For instance, Sasuke's Sharingan could be used to predict enemy moves during heists in Saints Row 3. It would give the Saints an edge in combat situations.
In a fanfiction, characters like Sasuke from Naruto might initially be distrustful of the characters from Final Fantasy 13. However, as they face common challenges, they would start to work together. Lightning, with her strong leadership skills, could inspire Naruto to be more strategic in his battles. And Naruto's positive attitude could influence some of the more brooding characters from Final Fantasy 13.
He might interact with them in a teaching way. For instance, showing them how to use chakra to enhance their physical abilities like he does with his ninja training. He could also be in awe of their magic and try to learn from them.
Well, think about it. Naruto is all about making friends and believing in people. So when he meets the FF8 characters, he'd try to befriend them right away. He might find Squall's cold exterior a bit hard to crack at first, but he wouldn't give up. Meanwhile, the FF8 characters would be intrigued by Naruto's strange powers. They'd watch in awe as he performs his rasengan or summons a toad. The female characters would also have their own dynamics. Sakura could admire Rinoa's ability to fly with her angel wings and Rinoa could be impressed by Sakura's medical skills. These interactions would create a rich tapestry of relationships in the fanfiction.