One great Fairy Tail Nalu highschool fanfiction is 'High School Days with Nalu'. It beautifully portrays their relationship in a high school setting, with lots of cute and fluffy moments between Natsu and Lucy.
In that fanfiction, it might be designed that way. Naruto has incredible powers in his own series, like his various jutsu. If translated into the Fairy Tail world in fanfiction, his skills could potentially make him very powerful. But it also depends on how the author of the fanfiction interprets and balances the power systems of both universes.
The Sharingan in such a fanfiction could be used as a tool for a Fairy Tail character to gain an edge in their battles. They might initially struggle to control it, but as they learn more about it, they become a formidable force. For instance, they could use the Sharingan's genjutsu abilities to deceive opponents in the Fairy Tail battles.
Natsu from Fairy Tail is often popular. His fiery personality and powerful dragon - slayer magic can make for exciting scenarios in the fanfiction. In the context of the Highschool DxD world, his straightforwardness and eagerness to fight would stand out.
A possible storyline is about a character from Fairy Tail who transfers to the Highschool DxD school. They have to adapt to the new environment which is full of devils, angels, and fallen angels. Along the way, they make new friends and enemies, and their Fairy Tail magic causes quite a stir among the students.
The characters in this fanfiction would develop in various ways. Natsu, as the alpha, might start off as a bit of a hothead but gradually learn to be more responsible. His friends would also grow. For example, Happy could become more independent and helpful. The other Fairy Tail characters in high school would adapt to the new environment. Gray might become more competitive in academics while still maintaining his rivalry with Natsu.
The popularity of Fairy Tail Nalu highschool fanfiction lies in the unique dynamic between Natsu and Lucy. Their personalities, Natsu's fiery and impulsive nature and Lucy's more rational and kind - hearted side, create an interesting contrast in a high school setting.
Lucy might also be very popular. She's smart, friendly, and has a great sense of fashion. She could be the girl that a lot of students go to for advice, whether it's about schoolwork or personal problems. Plus, her celestial magic is really cool, which would earn her some admiration.
Maybe there could be a big competition at the highschool, like a magical sports event. Different characters from Fairy Tail would form teams and compete, with rivalries and friendships being tested. For example, Natsu's team against Gray's team, and there could be some comical moments as well as intense battles.
One possible plot could be the characters from Fairy Tail having to survive in a highschool during a zombie apocalypse. They could use their magic powers in unique ways to fight off the zombies and protect their classmates. For example, Natsu could use his fire magic to burn groups of zombies at once.