Another plot could be that she was raised in a different village under false pretenses, believing she was an orphan. When she discovers she is Naruto's sister, she has to decide whether to stay in the village she grew up in or return to Konoha. Along the way, she has to face her own identity crisis and deal with the political implications of her new - found family relation.
She could be very strong - willed, much like Naruto. Since she has grown up without her family, she has had to be tough to survive. Maybe she is also very curious about her past and her brother, which drives her to seek out the truth.
One possibility could be that she shows up at Camp Half - Blood unexpectedly. Maybe she was raised by a mortal family all this time, not knowing about her demigod heritage. When she arrives, she has powers similar to Percy's but also some unique ones, like the ability to communicate with sea creatures in a different way than Percy. This could lead to all sorts of adventures and conflicts within the camp as everyone tries to figure out who she really is and what her role will be.
One interesting plot could be that the long - lost sister has unique magical abilities that even Harry doesn't possess. For example, she might be able to communicate with magical creatures in a way no one else can. This could lead to her helping Harry in his adventures against Voldemort by getting the support of powerful magical beasts.
One great fanfiction on this topic is 'The Lost Malfoy'. It delves deep into the character of Draco's long lost sister. She has been living in the Muggle world all this time and discovers her true identity. The story is full of heart - warming moments as she tries to fit into the wizarding world she never knew she belonged to.
Another plotline could be that she was cursed as a child and lost her memories. Years later, she starts to regain her memories and realizes she is a Malfoy. Draco then has to help her navigate the wizarding world that she has forgotten while also dealing with his own feelings about having a long lost sister. It could involve adventures in finding a way to break the curse completely.
Her character could develop in a way that is very much in contrast to Percy. While Percy is often impulsive, she could be more calculating. This difference causes some friction at first, but as they face challenges together, they learn from each other. For example, she might teach Percy to think before he acts in some situations, and Percy could show her how to be more spontaneous and trust her instincts. Over time, she becomes more well - rounded, balancing her cautious nature with a newfound sense of adventure.
Hermione Granger is often paired with Harry Potter's long - lost sister. Hermione's intelligence and knowledge of magic can complement the sister's unique abilities. They can form a strong trio with Harry, with Hermione providing the logical solutions and the sister bringing in her special powers.
One possible plotline could be that the long lost sister was separated from Harry due to a powerful dark wizard's curse. She might have been raised in a different magical community, like a far - flung wizarding village in Scotland. When she discovers her true identity, she has to quickly adapt to the wizarding world Harry is familiar with, facing challenges like learning about Hogwarts and its traditions.
She could also have a different view of the world compared to the Lost Boys. Since she has a connection to the stars, she might see things from a more celestial perspective. This could lead to interesting conflicts and resolutions within the fanfiction. For example, she might think that certain actions the Lost Boys take are wrong according to the stars' 'code' or something similar.