Hermione would probably be very curious. She'd immediately start researching in the library to find out if there are any known cases of wizards having tails and how to reverse it if it was an unwanted condition. Ron, on the other hand, would likely make some jokes at first, but then be supportive. He might say something like 'Well, at least it makes you stand out even more, Harry!'. Dumbledore would be his usual calm self. He might see it as a sign of something greater or a test for Harry, and offer some cryptic advice.
Hermione would probably be both curious and worried. She'd want to research all about Harry's half - demon nature to find out what it means and how to help him. Ron, on the other hand, might be a bit more hesitant at first. He might be a bit scared but would eventually come around because of his loyalty to Harry.
Dumbledore would be very cautious. He would see Harry's reincarnation as a great risk but also an opportunity. He might try to guide Harry, but also keep a close eye on him to prevent any disasters. The Malfoys would likely see this as a chance to bring down Harry and his friends. They would spread rumors and try to turn the wizarding world against him. Harry's other friends from Gryffindor would be a mix of shocked, scared, and some would be brave enough to stand by him, believing that Harry is still the same person deep down.
Hermione would probably be very curious and immediately start researching ways to reverse the transformation or at least understand it better. She'd be quite protective of Harry too.
If Harry is turned into a weapon, Ginny would be heartbroken. She would be by his side constantly, trying to communicate with him even though he's in weapon form. The Weasley family as a whole would be outraged. They would see it as an attack on one of their own. Snape might initially seem indifferent but secretly would also try to find a way to reverse it, perhaps out of his complex feelings towards Harry and his loyalty to Dumbledore.
In a fanfiction, the students at Hogwarts would be really intrigued by Hawkeye. They've grown up in a world of magic, and Hawkeye would represent a different kind of power. Neville might look up to Hawkeye as someone who uses their own skills to fight, without relying on magic. Ginny would probably be eager to team up with Hawkeye in any battles or adventures, seeing his potential as an ally in the fight against evil.
Hermione would probably be very curious about Darkseid at first. She'd try to research him in the Hogwarts library, looking for any clues about his powers and weaknesses. But once she realizes the danger he poses, she'd be quick to come up with strategies to fight him.
Hermione would be extremely curious. She would immediately start researching it, trying to figure out its mechanics and where it came from. She might even try to find a way to improve it or adapt it to the wizarding world's technology.
The characters in Harry Potter might be quite shocked at first. Hermione would probably be very curious about Wonder Woman's world and powers. Ron might be a bit jealous at first but would come around. In the DC side, Wonder Woman's friends like Steve Trevor would be protective at first. But as they see how happy she is with Harry, they would accept him. The wizarding community would have to adjust to having a superhero as part of their world through marriage, and the superheroes would have to accept a wizard into their midst.
He may be confused at first. Fanfics can be very different from his real experiences. He might wonder why people write such things about him and his world.