One interesting plot twist could be that she discovers she has a hidden power related to lightning, like the ability to create a new type of lightning that can heal instead of destroy. Another could be that she finds out she has a long - lost sibling among the Greek demigods who she has to team up with to face a common enemy. Maybe she also discovers that Zeus has been protecting a secret about her mother all along, which changes her view of her family completely.
In this fanfiction, a significant plot point could be the relationship between Harry and the Greek gods. Since she's Zeus's daughter, she might have to interact with them. Some gods could be friendly and help her, while others might be jealous or see her as a threat. Another aspect could be how her new identity affects her relationships with her friends at Hogwarts. Will they be accepting or will there be some jealousy? And finally, the story could revolve around a prophecy related to her being Zeus's daughter and how she has to fulfill it to save both the wizarding and divine worlds.
One possible plot could be that she discovers her divine heritage while at Hogwarts. Maybe she starts to show powers that are a mix of wizardry and godly abilities, like being able to control the weather during a Quidditch match. This would cause a stir among the students and teachers alike.
In some fanfictions, a cool plot twist is that the daughter of Zeus has a power that is only activated when she is in great danger. So, in a battle against a powerful enemy, she suddenly reveals this new power that completely turns the tables. It could be something like the ability to create duplicates of herself, confusing the enemy. Another plot twist could be that she has a hidden bond with a certain weapon, like a sword that has its own consciousness. The sword might choose her as its wielder, and together they have powers that are far greater than expected. And there could be a plot twist where she discovers that Zeus has been keeping a big secret from her about her mother, and this secret changes her whole view of herself and her place in the world of demigods.
One interesting plot twist could be that Fem Harry forms an unexpected alliance with a Slytherin student. Maybe she realizes that not all Slytherins are as bad as they seem in the context of the Triwizard Tournament. This changes the whole dynamic of the story as she now has an inside source in a house that was previously seen as her rival.
One plot idea could be that Fem Percy, with her unique skills and courage, is wrongly accused by Zeus of a crime she didn't commit. She then has to prove her innocence while facing various challenges set by Zeus. Another idea is that Zeus, intrigued by Fem Percy's power, tries to recruit her for a special mission, but Fem Percy has to decide if she can trust Zeus. A third plot could be that there is a prophecy involving both of them, and they must work together despite their differences to prevent a great disaster.
In some of these fanfictions, a really cool plot twist is that Fem Harry has an unknown magical heritage on her mother's side that gives her powers that are very different from normal wizarding abilities. This makes her stand out even more in the Weasley family. The Weasleys then have to deal with the jealousy and envy of other wizarding families who want to use Fem Harry's powers for their own gain. Also, she might be able to communicate with the portraits in Hogwarts in a way that no one else can, which leads to her getting crucial information about the school's history and secrets.
Well, perhaps a plot twist is that Fem Harry Potter's magical abilities take on a different form at Beauxbatons. Instead of the typical Gryffindor - like courage - driven magic, she starts to develop a more refined and elegant form of magic influenced by the Beauxbatons environment. And then, she might get caught in the middle of a power struggle between two powerful Beauxbatons professors who each want to use her for their own purposes. Also, it would be cool if she uncovers a hidden prophecy about herself that was hidden in the Beauxbatons library all along.
A great plot could be Fem Harry being hunted by vampire hunters who mistake her for a normal vampire. Since she has wizarding skills, she could use magic to outwit them in creative ways. Also, her story could involve finding other hybrids like her. Maybe there are some half - vampire, half - something - else beings out there, and she teams up with them. Regarding her relationship with Klaus, he could be teaching her how to control her vampire side, but at the same time, Fem Harry is trying to keep her wizard identity a secret from the vampire world.
One plot idea could be Hermione's struggle to fit in among the other demigods. Since she's the daughter of Zeus, she might have immense power that she has to learn to control. Another could be her going on a quest to retrieve a powerful artifact that only she, as a daughter of Zeus, can handle. Maybe she has to face off against an ancient enemy of Zeus that has been awakened.
One interesting plot twist could be that fem Harry Potter is mistaken for a long - lost relative of a powerful family in Westeros. This leads to her being dragged into the power struggle. Meanwhile, Jon Snow, who initially distrusts her, realizes she has no interest in power and they end up teaming up against common enemies. It's a great way to mix the two storylines and create unexpected alliances. There are also fanfictions where fem Harry Potter's Patronus has a strange effect on the creatures in Westeros, like taming direwolves in a way that no one has seen before. This causes Jon Snow to view her in a new light and their relationship develops in a whole new direction.