In battles, she could have a different fighting style. If Harry is more of a frontal fighter, using his Gryffindor courage and his signature spells like Expelliarmus. The twin sister could be more of a strategic fighter, using her knowledge of the school's layout and magical objects to set traps or use defensive magic in a more creative way, which would greatly impact the outcome of the battles in the fanfiction.
If she exists, it might affect the relationship between Harry and his friends. For instance, Ron and Hermione might also become closer friends with her. And she could bring a new perspective to their group. Say she is more interested in the history of magic and spends time researching in the library, she might find clues that help them solve problems in a different way than Harry would have on his own.
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 would completely transform the story. Hermione being Lily's twin would mean that the Marauders might have interacted with Hermione as well. Sirius and Remus might have seen her as an additional person to protect. And Hermione's presence could have potentially led to different outcomes in the events leading up to James and Lily's death. She might have been able to come up with a different plan to hide from Voldemort, using her vast knowledge of magic.
Well, it would definitely change Harry's relationship with Ron and Hermione. The twin sister might become a closer friend to Hermione, sharing a different kind of bond as two female witches. And Ron might be a bit jealous at first of the new addition to their group.
Well, if Hermione had a twin sister in fanfiction, it could change the story in many ways. For example, there could be more help for Harry and Ron. The twin sister might have different skills or knowledge that could assist them in their adventures. Maybe she's better at potions or has a special connection with certain magical creatures. It would also add more family drama and relationships to explore. Hermione's relationship with her sister could be a mix of love, rivalry, or both. This new character could also interact differently with the other students at Hogwarts, like having her own group of friends or enemies.
Well, if Hermione was James' twin sister in a fanfiction, it would completely change the dynamics. For one, Hermione's intelligence and magical ability would be part of the Potter family from the start. The Marauders might have had an even more powerful member in their group. And Hermione could have influenced James' actions towards Snape in a different way, perhaps lessening the animosity between them. It could also mean that Hermione would have a different backstory, growing up in the Potter household instead of with Muggles.
If Harry Potter had a sister in fanfiction, it could completely shift the dynamic of his relationships. She might be more popular or less so than Harry, which would affect how people interact with them both. Also, she could be the target of Voldemort as well, or perhaps Voldemort would try to use her against Harry. This would add another layer of danger and complexity to the story. And if she was friends with different characters, like being really close to Hermione before Harry was, it would change the way the trio formed.
She could be different in terms of personality. Harry is often seen as somewhat reserved and brooding at times. His twin sister might be more outgoing and cheerful, always able to see the bright side of things even in the darkest of times. This difference in attitude could lead to her being the one who cheers up Harry when he's feeling down.
If Hermione were Sirius's twin sister in fanfiction, it would mean a major shift in her character arc. Firstly, her appearance might be different as she would likely inherit some Black family traits. Her magical abilities could also be influenced. In the original story, Hermione was always an over - achiever, but with the Black family connection, she might have had a different approach to magic. Maybe she would be more confident in her natural abilities rather than relying so much on study. In the fight against Voldemort, she could have used her family's resources and connections. For example, she might have known about secret Black family spells or artifacts that could have been useful. Her relationship with Snape would also be very different. Since Snape had a history with the Black family, he might have treated her with more respect or more animosity, depending on how the story was written.
In this fanfiction concept, the story would be turned on its head. The whole mystery around Harry's parents and his connection to Snape would be reimagined. Their shared heritage as twins could lead to new magical abilities that they discover together. The Hogwarts houses might even treat them differently. For instance, Snape being a Slytherin and Harry being a Gryffindor in the original, but as twins, there could be a whole new dynamic within the houses. And the final battle with Voldemort could be fought in a completely different way with their combined strength and new - found relationship.
Well, Ruby's twin sister could have a different view on the world of Remnant. This could lead to the team splitting up at times, with Ruby following one path and her sister another. It would add a lot of drama and new storylines as they reunite and face their differences.