If Harry Potter goes to the DC Universe in a fanfiction, it could be really interesting. His magical skills would be a new element in the DC world. He might be confused by the different powers and technologies there. For example, his invisibility cloak would be a different kind of 'invisibility' compared to the technology - based ones in DC. He could also learn a lot from the DC heroes about courage and justice, and in turn, teach them about the magic world.
He could fit in as a unique hero. His magic could be seen as a special power like the others in DC. For instance, he could use his Patronus charm to fight off fear - inducing villains.
In a fanfiction where Harry Potter is in the DC Universe, there are countless possibilities. He could introduce magic to the DC world on a large scale. Imagine him using the Patronus charm to protect Metropolis from Doomsday. His wand could be a unique weapon in a world full of superpowers. Also, his knowledge of the wizarding world could help in solving some of the DC Universe's mysteries, like ancient spells that could counteract certain super - powered threats.
In the alternate universe, Harry could meet different versions of his friends and enemies. His relationship with them would be very different. For instance, Hermione might be a Death Eater or Ron could be a powerful dark wizard. It would be a huge shock for Harry to deal with these new identities of people he thought he knew well.
It could be really exciting. Maybe Harry Potter characters could visit Gotham City. Harry could use his magic to help Batman fight crime in a way that normal gadgets can't. For example, he could use spells to disarm villains from a distance or create magical barriers to protect civilians.
Well, he might be seen as an outsider at first. The DC heroes, like Superman and Batman, would be curious about this new guy with his own set of powers. Maybe Spider - Man would try to team up with some of them to fight a common enemy. For example, he could join forces with The Flash and use his speed and Spider - Man's agility to take down a powerful villain.
He might become more confident in using his magic publicly. In the DC Universe, with all the super - powered beings around, he'd have to step up his game. So his character could grow to be more assertive.
Well, Harry could be really confused at first. Ouran is a very different world from Hogwarts. He might be shocked by the opulence of Ouran Academy and the strange club system there. Maybe he'd try to find a way to fit in while still being true to his wizard self.
I think Hermione and Superman would be an interesting pair. Hermione is all about knowledge and learning, and Superman, with his alien origin and super - intelligence, could share a lot with her. They could exchange ideas about their respective worlds, and Hermione might even find a way to use magic to enhance Superman's powers or help him in some way.
His personality might also be influenced by the people he meets in the alternate universe. If he meets a group of very kind and peaceful wizards, he could become more laid - back and positive. On the other hand, if he is surrounded by cruel and calculating wizards, he may become more withdrawn and calculating himself as a form of self - protection.