Well, if Harry Potter had a twin brother in fanfiction, it would change a lot. For one, Voldemort might have to deal with two threats instead of one. The twin could have different magical abilities or a stronger connection to certain aspects of magic. Their relationship with Ron and Hermione could also be different. They might split the group's attention, and new dynamics would form within the friendship.
In fanfiction where Harry has a twin brother, it could completely rewrite the narrative. The twin could have been the one sorted into Slytherin while Harry went to Gryffindor, creating a rift between them due to the house rivalry. This would add a whole new layer of conflict. Or perhaps they would work together to bridge the gap between the houses. They could also combine their magical skills in unique ways to face the challenges that come their way, like dealing with the Death Eaters and Voldemort.
Her personality might be a contrast to Harry's. While Harry was often impulsive, she could be more cautious. She might be more of a thinker, using her intelligence to analyze situations. However, she would still have that Gryffindor courage deep down. In social situations, she could be more outgoing than Harry, making friends more easily. And she might have a special interest in magical creatures, spending her free time in the Forbidden Forest studying them.
Perhaps she would have different magical abilities compared to Harry. While Harry is known for his connection to the Patronus charm and his ability to speak Parseltongue, she could be a natural at things like divination or arithmancy. This would make their dynamic interesting as they would each bring different skills to the table when facing the various threats in the wizarding world.
Well, perhaps in this fanfiction, Harry and Pansy's family has some dark secrets. As Harry is her twin, he could be involved in uncovering these secrets. This might lead to him having a more complex relationship with the Dark Arts. He may be tempted by the power it offers, but his good nature, which is still there despite his Slytherin background, would keep him from fully embracing it.
If Harry Potter had a twin sister in fanfiction, it would likely make the story more complex. She could have been sorted into a different house, like Gryffindor or Ravenclaw. This would have given her a different set of friends and experiences. Her relationship with other characters would also be different. For instance, she might have had a closer bond with Hermione or Ron in a unique way. And in battles, she could have used her own unique skills, perhaps being more stealthy or having a special talent for defensive magic.
It could be a very strange and interesting story. Harry might have some sort of divine powers in addition to his wizarding abilities. Maybe he could perform miracles or have a special connection to a higher power that helps him in his battles against Voldemort.
In such a fanfiction, there would be a lot of cultural clashes and interesting interactions. Harry, being raised in the wizarding world, would have to adapt to Asgardian customs and vice versa for Thor. The story could explore how their different upbringings shape their personalities. Also, their combined powers could be a great asset in battles. For example, Harry could use magic to enhance Thor's lightning attacks or Thor could use his strength to protect Harry during a wizard duel. It would be a story full of action, magic, and brotherly bonding.
It could be really exciting. Maybe Harry would use his magic in Gotham City to fight crime alongside Batman. Or perhaps they'd discover their relation through some mysterious magical - technological means. Their different skills and abilities would make for an interesting combination in the story.
Well, in such a fanfiction, it could start with Harry discovering that he has a brother in Sherlock. The plot could involve them coming together and realizing how their different worlds - the magical world of Harry Potter and the detective - filled world of Sherlock - can complement each other. For instance, Harry could use his invisibility cloak to help Sherlock in stakeouts. And Sherlock could use his powers of observation to help Harry in the wizarding world, like noticing if someone is under a charm or a spell. It would be a unique blend of two very different universes.
It could be a story full of mystery. If GWL has some special powers or a unique background, Harry's relationship with him as a brother could lead to all sorts of adventures. Maybe they discover secrets about their family together that were hidden from Harry all along.
The twin could change the plot by being more interested in academic magic than Harry. This might lead to him uncovering secrets in the library that Harry misses, which could be crucial in the fight against Voldemort.