At first, Sasuke would probably be very guarded. But Harry, being friendly, would try to break through that. Harry would show Sasuke around Hogwarts, and Sasuke might be a bit dismissive at first, thinking his ninja skills are superior. But as he sees the power of magic, he'd start to respect it. They would have conversations where Harry tries to understand Sasuke's past traumas, and Sasuke might be hesitant to open up. However, over time, they would bond, especially when facing a common enemy. Harry would use his quick thinking and magic, while Sasuke would use his combat skills.
Yes, there might be such a fanfiction. The world of fanfiction is vast and full of creative crossovers. Writers often like to combine different fictional universes to create unique stories. So it's not surprising that someone would come up with the idea of Harry being Sasuke's brother in a fan - made story.
Another one is 'Sasuke and the Girl from Another Realm'. Here, Fem Harry arrives in the Naruto realm and immediately catches Sasuke's attention. The story is filled with mystery as Fem Harry tries to find a way back to her own world while also getting involved in Sasuke's life. The fanfiction is well - written, with detailed descriptions of both the Potter - like magic Fem Harry brings and the ninja culture that Sasuke is a part of.
Sasuke's adaptation would be a long process. He'd start by observing the daily lives of wizards. He'd notice how they use magic for simple tasks like lighting candles or cleaning. In contrast, in his past life, he'd use ninjutsu for such things. He'd have to get used to the fact that he can't just rely on his Sharingan all the time. He might attend classes at Hogwarts and learn about different spells. At the same time, he'd be constantly comparing the magic here to his ninja skills. As time goes on, he'd start to blend in more, using magic in his own unique way that combines his ninja - like thinking.
One possible plot could be that Harry, after his death in the Harry Potter universe, is reincarnated as Sasuke in the Naruto world. He would then have to deal with Sasuke's past traumas and his own new set of ninja skills and challenges. He might use his knowledge from the wizarding world in unexpected ways in the ninja world, like using magic - like spells that are disguised as ninja jutsu.
Well, perhaps in this fanfiction, Harry, being from the wizarding world, uses his magic to somehow enter Sasuke's world. He might see Sasuke's troubled past and decide to take him in. Harry could then teach Sasuke about magic, which would be a huge culture shock for Sasuke. And they could form a bond over their shared experiences of loss and the need to prove themselves.
One possible scenario in this fanfiction could be that Harry Potter and Sasuke are somehow transported to a shared magical realm. When they encounter a Boggart, Harry might see Voldemort at first, given his past traumas. Sasuke, on the other hand, could see Itachi. But as they realize they are in this together, they combine their magical and ninja skills to defeat the Boggart. Maybe Harry uses a Patronus charm while Sasuke uses his Sharingan to disorient the Boggart.
Perhaps a fanfiction where Sasuke discovers a Portkey in his world that leads him to Hogwarts. He has to adapt to the new magical environment and forms an unlikely friendship with Harry Potter. Together, they explore the secrets of both their worlds and use their combined skills to face challenges.
One idea could be a crossover where Sasuke is somehow transported to the Harry Potter universe. He could attend Hogwarts and his ninja skills might be mistaken for advanced magic. Maybe he gets sorted into Slytherin because of his ambitious nature.
The theme of self - discovery is also quite common. Fem Harry may discover new aspects of herself in the Naruto world, and Sasuke might also learn something about himself through his interactions with Fem Harry. Additionally, the theme of facing challenges together is prevalent. Whether it's dealing with villains from either of their worlds or just the general difficulties of co - existing in a new environment, they have to rely on each other and grow stronger together.