In some fanfictions, Fem Harry is experimented on as a result of her being in the wrong place at the wrong time. For instance, she could be captured by a group of rogue wizards who are interested in the secrets of the Boy - Who - Lived. They might subject her to a series of cruel experiments to extract that knowledge. These experiments could range from invasive magical scans to forcing her to perform dangerous spells. The story then usually focuses on her escape and how she uses the new - found knowledge or powers (if any) from the experiments to either seek revenge or protect the wizarding world.
Often, a plotline involves Fem Harry being experimented on to understand the connection between her and Voldemort better. Since in the original story there is a special link between them, in fanfiction this can be explored through experiments. Maybe she's put through magical tests that measure her mental and magical responses when Voldemort is near or when something related to him is present. Sometimes, the experiments are related to her gender change as well. Scientists or wizards in the fanfic might be trying to figure out if her new femininity gives her different magical properties compared to male Harry. This can lead to all sorts of interesting developments in the story, like her being able to use love - based magic more effectively because of her new form.
One common theme could be exploring the unique challenges a female Naruto might face in a world dominated by male shinobi. For example, she might have to deal with different expectations regarding her strength and abilities.
One common plotline could be Fem Harry facing discrimination in the wizarding world for being a female fighter. People might underestimate her at first. Another could be her training journey, like learning unique fighting spells or martial arts in the magical world. And she might also have to prove herself in duels against male opponents who think she's not capable.
A common plotline is the 'forbidden love' aspect. Since Draco is from a Slytherin pure - blood family and Harry is a Gryffindor, their relationship is not expected or approved. Another plotline could be Draco trying to protect Fem Harry from some dark force, which makes him realize his deep feelings for her. It could also involve Fem Harry initially hating Draco because of his past behavior, but as she discovers his true feelings, she starts to see him in a new light.
Often, the plot might involve Fem Harry Potter exploring different magical cultures around the world throughout the ages. Since she is immortal, she has the time to delve deep into ancient and forgotten magics, and maybe even bring some of those lost arts back to the wizarding world of Hogwarts. This could lead to new friendships and alliances with magical beings from all over.
She could be defiant. Since Harry has always been a fighter in the original series, Fem Harry might resist the experiments every step of the way. She could try to escape the moment she realizes what's going on, using her wits and any available magic. For example, she might use a disillusionment charm to slip away from her captors.
Well, one possibility is that in fanfiction, Death Eaters who survived the war might capture Harry Potter and experiment on him to extract the power of his connection to Voldemort. They might believe that this power could be harnessed for their own evil purposes. Also, there could be fanfictions where rogue wizards from other countries experiment on Harry, seeing him as a unique specimen due to his fame and his defeat of the most powerful dark wizard in history.
Perhaps Naruto starts to have a connection to Orochimaru's other experiments or creations. He might find himself in a situation where he has to either help or fight these other 'products' of Orochimaru's mad science. Also, the fanfiction could explore how Naruto's friends react to what has happened to him. Do they trust him still? Or are they afraid of what Orochimaru might have turned him into?
One common plotline could be the two of them fighting against a common enemy. Maybe there's a new threat that neither the magical world nor Natasha's world can handle alone. So they team up, and during this process, their relationship deepens. Another plotline might be Fem Harry Potter teaching Natasha about magic, which creates a unique bond between them.
Often, there's a plotline about her relationships. Her non - human nature might affect how she interacts with her friends like Ron and Hermione. They might have to learn to accept her new form or powers. And in romantic relationships, her non - human qualities could either attract or repel potential partners, creating a complex web of emotions and interactions.
One possible plotline could be their first encounter. Maybe Rhaegar, with his noble and somewhat mysterious air, meets Fem Harry in a forest. Their initial meeting might be filled with confusion as they come from different worlds but are drawn to each other's unique qualities.