One plot idea could be that Jasmine Potter has a special power that Harry doesn't. For example, she can communicate with magical creatures in a unique way. This power could lead her to discover a hidden secret about Hogwarts that's crucial for the fight against Voldemort.
Another idea is that Jasmine Potter is kidnapped by Death Eaters early on. Harry then has to go on a solo mission to rescue her, during which he discovers more about his family's past and some dark secrets. Along the way, he meets characters who help him not just because of his status as the Boy Who Lived, but because they see his determination to save his sister.
One interesting 'Harry Potter Twin Jasmine' fanfiction could be one where Jasmine is a new student at Hogwarts and she discovers she has a special connection to the Weasley twins. Maybe she helps them with their pranks in a unique way, adding a new twist to the usual Hogwarts shenanigans.
Maybe the twin sister has a different type of magic than Harry. For example, while Harry is known for his connection to Voldemort and his Parseltongue ability, she could have the power of prophecy. She starts having strange dreams about future events in the wizarding world that are crucial to saving it from new threats, and she has to figure out how to interpret and act on these prophecies.
A cool plot could be that the twins cross over into a dimension where they are sorted into different houses. Fred in Slytherin and George in Gryffindor. This would create an interesting dynamic as they deal with the different values and expectations of their new houses while still maintaining their close bond. They could also have to face the prejudice and misunderstandings from their housemates due to their 'unusual' sorting.
Jasmine might be more competitive with Hermione. Since they are both female and likely to be intelligent, they could have a bit of a rivalry in academics. For example, they might constantly try to outdo each other in Potions or Transfiguration.
Maybe the twin sister is sorted into a different house than Harry. This would cause a bit of a rift at first as they have to adjust to different house cultures. But in the end, they learn to combine the strengths of their respective houses to overcome a great threat to Hogwarts.
Another plot could revolve around Harry's Occlumency lessons. In fanfiction, it could be that instead of just trying to block his mind from Voldemort, he actually manages to use Occlumency to his advantage. He could start to plant false thoughts in Voldemort's mind through their connection, leading Voldemort astray in his plans.
A great plot for a Potter Manor fanfiction could involve a mystery that surrounds the manor. For instance, strange noises at night lead Harry to uncover a long - forgotten chamber. It could also be about Harry restoring the manor to its former glory, perhaps with the help of Hermione's research on ancient magic used in the construction of such manors.
One idea could be exploring the magical preparations that took place before his birth. Maybe there were ancient spells cast to protect him. Another could be focusing on his parents' emotions during that time. For example, how Lily was feeling knowing Voldemort was a threat. And perhaps a plot where the wizarding community was secretly planning something in case Voldemort attacked right after Harry was born.
There could be a fanfiction where Harry's twins are sent to a different magical school for some reason. In this new school, they face various challenges and make new friends, all while still having a connection to Harry and the events at Hogwarts. They might learn different kinds of magic and bring those new skills back to the wizarding world they originally came from.
Well, obviously Jasmine is one of the main characters. And then, usually, the Weasley twins, Fred and George, play significant roles. They often interact with Jasmine in various ways, like being her friends, partners in some magical adventures or even mentors in a sense, teaching her about the ways of Hogwarts and the wizarding world in general.