In fanfiction, the idea of Harry being Naruto's older brother might be possible if we consider that both characters have some similarities in their personalities. They are both determined and face great challenges. So, a writer could create a backstory where there is some sort of connection between their two worlds that makes them family. For example, perhaps a wizard from the Harry Potter world visited the Naruto world long ago and had a relationship that led to Harry and Naruto being related.
One way this could work in fanfiction is if we think about the overarching themes in both series. Harry Potter deals with themes of good vs. evil, friendship, and sacrifice, while Naruto also has these elements. A fanfiction writer could build on these shared themes to create a scenario where Harry is Naruto's older brother. They could say that the forces of good in both universes are somehow connected, and this connection led to the two characters being part of the same family. It could be that there is a prophecy in both worlds that foretold of this connection, and the two characters are destined to meet and discover their family relation.
Well, in this fanfiction concept, it could work in terms of Naruto's protective nature. Naruto is known for his loyalty and his will to protect those he cares about. If he were Erza's older brother, he would surely use his skills and abilities to keep her safe. He could teach her some of his ninja techniques, which would be really cool to see combined with Erza's own combat skills. Also, Naruto's positive attitude could influence Erza in a different way, making her more open and perhaps less brooding at times.
The older brother in the fanfiction might be a character with a tragic past. For example, he could have been experimented on by Orochimaru and gained some strange powers as a result. And he returns to the village later to protect Naruto from the threats that are coming towards him.
Well, in a fanfiction world, it could be possible through some creative storytelling. Maybe there's some kind of multiverse concept where the Naruto universe and the world of Cinder somehow collide. The author might create a backstory where their parents are connected in a very unexpected way. For example, perhaps a powerful wizard or entity has the ability to cross different fictional realms and unites their families for some grand, overarching plot purpose.
Well, in fanfiction, anything can be possible. It could be that in this fictional universe, there are some magical or cross - dimensional events that led to Naruto and Pyrrha being related as siblings. Maybe there's a powerful being that decided to create this strange connection for some greater purpose in the story, like uniting two different fictional worlds in a unique way.
One possible plotline could be that the older brother was thought to be dead but actually survived and returns to protect Naruto from the shadows. He might have some special powers or knowledge that he uses to keep Naruto safe without revealing his identity at first.
Well, it would change a lot. For one, Draco's family would have a different connection to Harry. Instead of being rivals, they might be more protective of Harry. Draco could use his pure - blood status to shield Harry from some of the prejudice in the wizarding world. Also, the whole dynamic at Hogwarts would shift. Draco might be more like an older brother figure to Harry, guiding him in certain aspects of magic and school life, which would be very different from their original hostile relationship.
In the fanfiction, the older brother could change Naruto's view of his family and his place in the world. Naruto would have a connection to his past that he didn't know before. This could lead him to explore more about the Uzumaki clan and discover hidden powers or knowledge. And it could also affect his relationships with Sasuke and Sakura. For instance, his brother could help him understand Sasuke's pain better, leading to a different dynamic between them.
At first, Vegeta might be resistant to having Naruto as an older brother. But Naruto's determination could win him over. Naruto would likely encourage Vegeta to use his power for good. And Vegeta might start to respect Naruto's way of handling things, gradually leading to a closer bond.
This would change a great deal. Naruto, being the older brother, would likely have a protective role over Ben. He might introduce Ben to his friends in the Hidden Leaf Village, like Sasuke and Sakura. Ben, on the other hand, could show Naruto the wonders of the Omnitrix and the different alien forms. In battles, Naruto could use his chakra and jutsu to create distractions or provide support while Ben takes on the main offensive with his alien powers. Their relationship could also add an emotional depth to the story, as they deal with family bonds and the responsibilities that come with their powers.
One possible plotline could be that the older brother is a prodigy at magic and overshadows Harry in the beginning. For example, he might be the top of his class in every subject at Hogwarts. This could create some jealousy or a sense of inadequacy in Harry at first. But as the story progresses, they could learn to support each other and the older brother could use his skills to help Harry in his battles against Voldemort.