Sasuke would likely be a bit more reserved in his reaction. He might see the cybernetics as a potential advantage for Naruto but also as a sign of Naruto relying too much on technology rather than his own natural skills. However, if he saw that the cybernetics made Naruto stronger and more capable of fighting their common enemies, he would probably come to accept it over time.
Sakura might be initially shocked and worried. She'd be concerned about how this new entity within Naruto could affect his health and stability. But she'd also be curious to see if this could give them an edge in future battles.
In Naruto future reaction fanfiction, characters might react to various things. For example, they could react to new jutsu developed in the future. They might be amazed at the power and creativity behind it. Maybe Naruto himself would be excited to see how the next generation has advanced the art of ninjutsu.
His friends would probably be shocked at first. Sasuke might be a bit conflicted, seeing Naruto with an Uchiha - like power. But they would also realize it could be a great advantage for Naruto and for their team as a whole.
His friends would probably be shocked at first. Sasuke might be a bit jealous since the Sharingan is a Uchiha thing. Sakura would be worried about the implications. Kakashi, having had the Sharingan himself, would be more understanding and might try to help Naruto control the new powers.
Naruto would be devastated. He has always idolized his father, so being betrayed by him would shatter his world. At first, he might be in denial, not wanting to believe that Minato could do such a thing.
He might be really surprised. Some fanfictions could show him in situations he never thought of, like different kinds of friendships or battles. He'd probably be curious about how fans see him and his world.
Yes, they probably would. Naruto might laugh at some of the comical fanfictions about his eating habits. He loves ramen, and if there are stories exaggerating this, he'd find it hilarious.
He could be deeply hurt. Naruto has a big heart, and Hinata has been an important person in his life. Her abandonment might make him question his self - worth. He might go into a bit of a slump, not being as enthusiastic as he usually is. But then, he's Naruto. He'd probably eventually pick himself up and try to figure out a way to either get her back or move on with his life in a positive way. He might also wonder if there's some greater danger or threat that he needs to deal with that caused Hinata to leave.
Most of the fandom would probably be horrified. Naruto is known for his positive values, and killing a family member is completely against that. There would likely be a lot of criticism towards the author of such a fanfic.