Sasuke would probably be dismissive at first. He'd think it was a waste of time and Naruto should focus more on their ninja goals. But secretly, he might be a bit curious himself. Sakura would likely be surprised and might tease Naruto a bit about it, saying he should be more interested in medical ninjutsu or something more relevant to their village. Shikamaru, on the other hand, would just sigh and say it's too troublesome for him to care, but deep down he'd understand Naruto's need for something different.
Kakashi would probably give Naruto a knowing look. He's a well - read person himself, so he might even recommend some good Bleach fanfiction to Naruto. Choji would be more interested in the food in the Bleach stories, like if they mention any cool food from the Soul Society. Ino would probably gossip about it with the other girls in the village, wondering why Naruto is so into something that's not about their own world. And Lee would be excited for Naruto, thinking that it could give Naruto new energy and motivation for his own training, even if it's from a different anime's fan - made stories.
His friends might be really shocked at first. They know Naruto as a ninja, not someone who sings fanfiction. Some might find it hilarious and start teasing him in a friendly way. For example, Shikamaru might say something like 'Only you, Naruto, would come up with something so strange.'
Sasuke would likely act like he doesn't care much. But secretly, he might be a bit intrigued as to why Naruto is into such things. He might think it's a waste of time or he could see it as another way Naruto is different from him.
Sakura might tease Naruto about it a little. She'd probably think it's a bit strange that he's interested in something so different from their own world. But she'd also be curious to know what it's all about.
They might be a bit surprised at first. But then they would probably be understanding. Hermione, for instance, might be interested in the literary aspects of the fanfiction he likes. Ron, on the other hand, might tease him a bit but still support his interest.
If their friends found out, Kiba might tease Naruto a little bit, but in a friendly way. He respects Hinata and Naruto, so he'd be okay with it. Ino would be all excited and would start asking Hinata for details. She's always interested in romantic stuff. Lee would be super positive and give Naruto a big thumbs - up, saying something like 'Youthful love is wonderful!'. And Neji, if he were still alive, would be very protective of Hinata at first, but then see how happy Naruto makes her and be supportive.
Sakura might be a bit surprised at first. She would probably tease Naruto a little about it, but then she'd also be curious to see what's in those fanfics. She might even start reading some herself to see how the fans portray her relationship with Naruto.
Harry would probably be shocked at first. He respects Remus a great deal, but Hermione is like a sister to him. He'd need some time to come to terms with it. Ron, on the other hand, might be more openly opposed. He has always had a bit of a protective streak when it comes to Hermione, and he might think Remus is too old for her. Ginny would likely be more understanding and might try to mediate between the others.
Harry and Ron would probably be shocked at first. Ron might be a bit scared, but Harry would quickly see the potential in Hermione's new ability. They would likely be proud of her for achieving such a difficult transformation and would support her in using it for good.
Hermione would probably be very shocked at first. She has always seen Draco as the enemy, so it would take her a while to come to terms with it. Ron might be more vocal in his opposition, thinking it's a really bad idea. But if they saw how happy Harry was, they might gradually warm up to the idea.
The Weasley family in general would be quite divided. Some of the older Weasleys might be more traditional and disapprove, thinking that Hermione could have done better. But the younger Weasleys like Luna might be more accepting. Luna has always been open to different ideas and relationships. As for Draco's friends, they might also be shocked. Some of his Slytherin friends might feel betrayed that he has married a Gryffindor, while others might see it as a bold and interesting move.