Well, a really interesting plot twist could be that Fem Harry is actually a key figure in an ancient prophecy that Bellatrix was trying to manipulate all along. In these fanfictions, Fem Harry might find out that Bellatrix's motives for raising her were not as simple as just having an apprentice. Maybe she was trying to use Fem Harry to gain some sort of ultimate power. Another plot twist could be that Fem Harry has some sort of latent magic ability that is awakened by Bellatrix's unorthodox training methods, like the ability to communicate with dark creatures in a way no one else can, which throws the wizarding world into chaos as they don't know whether to view her as a threat or an asset.
In such fanfictions, a plot twist could be that Fem Harry is in a love triangle with characters who are on opposite sides of the good - evil spectrum. This is because her upbringing by Bellatrix has made her not fully align with either side. Also, there might be a plot twist where Fem Harry discovers that Bellatrix was under the control of a more powerful dark wizard all along when she was raising her. This would completely change Fem Harry's perception of her surrogate mother. And finally, a plot twist could be that Fem Harry's very existence and the way she was raised by Bellatrix has a profound impact on the balance of magic in the wizarding world, causing strange and unexpected magical phenomena to occur.
One common plot twist could be that Fem Harry has a much darker personality due to Bellatrix's influence. For example, she might be more prone to using the Dark Arts. Another could be that she has a conflicted relationship with the Order of the Phoenix. Instead of being their ally immediately, she might be suspicious of them because of Bellatrix's teachings. Also, there could be a plot twist where Fem Harry discovers a hidden side of Bellatrix that was not all about the Dark Arts, perhaps a more maternal side that was buried deep within her, which makes Fem Harry question everything she thought she knew about good and evil.
One possible plot twist could be that Harry, under the influence of the dark side, forms an alliance with Bellatrix against the Order of the Phoenix. Maybe he discovers some dark secrets about his parents that lead him to question his previous beliefs and side with her.
One interesting plot twist could be that Fem Harry's presence among Voldemort's ranks causes internal conflict. Some Death Eaters might be distrustful of her because she was once the 'Boy Who Lived' in a female form. Another twist could be that Fem Harry starts to influence Voldemort's ideology in a way he didn't expect. Maybe she makes him question his pure - blood supremacy by showing that her Muggle - born friends were as powerful as any pure - blood wizard. Also, it could be that her joining was part of a long - con plan to bring down Voldemort from the inside, and she gradually starts to turn his own followers against him.
One possible plot twist could be that Harry, under Bellatrix's influence, becomes a much darker and more ruthless wizard. Bellatrix might train him in the Dark Arts, and he could end up being a sort of anti - hero. He might have a completely different view of the wizarding world and be at odds with his former friends from Hogwarts.
Well, it could be that Bellatrix adopts Hermione thinking she can use her to get to Harry Potter. But as time goes on, Hermione manages to turn the tables and uses Bellatrix's own desires against her. She convinces Bellatrix that she can lead her to greater power if she turns against Voldemort. This not only creates a rift between Bellatrix and her dark lord but also sets off a chain of events that no one could have predicted.
One interesting plot twist could be that Fem Harry Potter, with her magic skills, ends up changing the power dynamics in the Highschool DxD world. For example, she might introduce new spells that disrupt the existing balance of power among the various factions. Another could be that she has a hidden connection to one of the powerful characters in Highschool DxD, like a long - lost relative or something. This would lead to a whole new set of relationships and storylines. Also, perhaps her presence causes the different species in Highschool DxD to reevaluate their views on magic, as her magic might be different from what they are used to.
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.
The contrast in their characters makes it intriguing. Harry, originally a symbol of good, turning dark, and Bellatrix, a die - hard dark witch. When they interact, it's like two different worlds colliding. Their relationship can be explored in many ways, from mentor - student to something more complex like co - conspirators in a new dark order.
One possible plot twist could be that the Queen discovers Harry's magical abilities early on and decides to train her in a special way, perhaps combining magic with royal etiquette. This would give Harry a unique advantage in the wizarding world.
A plot twist could be related to Fem Harry Potter's magical abilities. Since she is raised by Crowley, she might develop some unique magical skills that are a blend of wizarding magic and Crowley's own brand of 'power'. This could make her a target for various groups in the wizarding world who either want to use her for their own gains or are afraid of her new - found powers. Also, Crowley might have some enemies in the wizarding world that he has never revealed to Fem Harry Potter. When these enemies discover her existence, they target her to get back at Crowley, putting her in great danger and forcing her to rely on skills and knowledge she has learned from Crowley to survive.
Well, sometimes in these fanfictions, the reborn Ultron might find out that it was created with a hidden purpose by an even more shadowy figure. This discovery could lead it on a journey to uncover the truth about its origin, and along the way, it has to decide whether to continue its vendetta against the Avengers or not. It's really interesting to see how the writers play with this concept of self - discovery.