Hermione would immediately start researching ways to heal him. She'd pour over ancient books and consult with the most knowledgeable wizards to find a cure or at least a way to ease his pain.
Ron would be by his side constantly, trying to cheer him up. He might tell jokes or share stories from their Hogwarts days to make Harry forget his pain for a while. Ron would also be protective, getting angry at anyone who seemed to pity Harry too much.
His other friends like Neville and Ginny would also rally around. Neville might bring some plants from the Hogwarts greenhouse that he believes could have healing properties. Ginny, being Harry's love interest in many fanfictions, would be very emotional but also strong for him, showing her love and support in every way possible.
Hermione would usually be very worried and immediately start looking for ways to heal him. She might use her knowledge of magic to find the right spells or potions to treat his injuries.
His friends would likely be devastated at first. Hermione, for instance, might throw herself into research to find out what really happened, believing there has to be a way to bring him back. Ron would be in a state of shock and anger, feeling like he failed to protect Harry. They would probably also start to question their own actions and whether they could have done something differently to prevent Harry's 'death'.
His friends would be extremely worried. They might immediately drop whatever they are doing to rush to his side. For instance, Thomas would be right there, trying to assess the situation and figure out how to help. He would be filled with a sense of urgency and determination to get Minho the care he needs.
He might be very sad at first. Harry has always valued his friends, so being forgotten by them would be a huge blow.
Hermione would be heartbroken as well. She would likely try to find a way to bring Lupin back, delving deep into the library's restricted section for any possible spells or solutions. She would also be the one to comfort Harry and Ron, using her logic to try to make sense of the senseless loss.
Socially, his status as a hero might change. Some might see him as weakened and no longer the invincible hero. This could lead to a shift in the wizarding community's perception of him, and he might have to work hard to regain his former standing.
At first, his friends would be shocked. Hermione might think it's some kind of dark magic at first glance. But as Harry shows them what he can do, she would start to analyze it scientifically. Ron would be more awed. He'd be like a kid seeing a new cool trick. They would both support Harry in exploring this new ability, but also be a bit cautious as they don't fully understand where it comes from or what the implications are in their wizarding world.
His friends would be very surprised. Hermione would probably be a bit skeptical at first. She'd want to research all about Witchers before she fully supported Harry's new interest. Ron, on the other hand, might be more excited. He'd see it as another adventure and would be eager to hear all about the Witcher world from Harry.
Ron would probably be both shocked and a bit awestruck at first. He might make some typical Ron - like jokes to ease the tension, like 'Blimey, Harry, you're a dragon! At least you'll be good for scaring off Snape now!'. But deep down, he'd be worried and determined to help Harry get back to normal.
His friends would be quite shocked. Neville might be a bit scared at first, thinking it's some new dark magic. But then they'd all come together. Ginny would probably be the one to try and comfort 'cat - Harry' by giving him some fish or milk, thinking that's what cats like. And they'd all be determined to get him back to normal as soon as possible.