One interesting plotline could be the main character using their wishes to change some of the major events in the Harry Potter universe. For example, they might wish to prevent certain characters from dying. Another could be using a wish to gain a special power that helps them in their adventures at Hogwarts, like being able to communicate with magical creatures more easily.
Well, it really depends on how the author writes them, but Draco Malfoy can be a very popular character in this type of fanfiction. In some stories, the reborn character might use a wish to change Draco's personality or his family's stance in the wizarding world. This can lead to some really interesting character development for Draco. Another character could be Dumbledore. The reborn character might wish to have a different kind of relationship with Dumbledore, perhaps getting more guidance from him earlier on, and that makes Dumbledore an important and popular figure in these stories.
A genie might grant the wish for a character to have the power of time - travel without the limitations of a Time - Turner. This would allow them to go back and forth in time freely. They could prevent certain tragedies from happening, like Sirius Black's death or Cedric Diggory's murder. This would have a huge impact on the overall plot and relationships in the story.
It could be a dark wizard who wants to use Harry's sister for some dark magic purpose. Maybe he believes that her blood or her unique magical essence can be used to open a portal to a world of dark magic or to resurrect an even more powerful dark force. This antagonist would stop at nothing to get his hands on her.
In some fanfictions, Harry's sister might be sorted into a different house than him, like Slytherin. This would create a lot of internal conflict within the family as well as at Hogwarts. It could lead to a situation where Harry has to defend his sister against the prejudices of his friends. Or perhaps she has a prophecy related to her that ties into Harry's own destiny, and they have to figure out how to fulfill both prophecies without sacrificing one another.
One great fem Harry Potter reborn fanfiction is 'The Girl Who Lived'. It offers a really interesting take on how a female Harry would handle the challenges in the wizarding world. The character development is well - done, and it has some unique plot twists compared to the original story.
One potential love interest could be Draco Malfoy. In this new scenario, as a girl, Harry might see a different side of Draco and they could develop a love - hate relationship that turns into a real romance over time. Another could be Neville Longbottom. They have a shared history of being underestimated, and as a girl, Harry might be drawn to Neville's kind and brave nature.
In this fanfiction scenario, Harry Potter might change in several ways. His perspective on life and death could shift. Knowing that his brother has some sort of'reborn' aspect could make him question the finality of death more. He could also become more empathetic towards those who have lost loved ones. Emotionally, he might be more stable as he has a family connection now. This new bond could also make him more willing to take risks in the name of protecting his brother, which is a different kind of motivation compared to just fighting Voldemort for the sake of the wizarding world. Additionally, he may develop new magical abilities or skills as a result of the influence of his brother's unique situation.
Well, perhaps Harry, reborn as Frieza, would use his wizarding knowledge in a different way. He could combine magic with Frieza's powers. Maybe he'd use spells to enhance his energy blasts or use his knowledge of potions to create new substances that could boost his strength even more in his new Frieza form.
Well, perhaps he would grow up with the unique Dorne culture. He might be trained in their style of combat which is different from what he learned in Hogwarts. And he could use the Dornish knowledge of poisons and healing in his new adventures.