In many 'harry helps voldemort fanfiction', the theme of self - discovery is present. Harry discovers new aspects of himself as he steps out of his normal role of fighting Voldemort and instead tries to help him. Voldemort also may go through a process of self - reevaluation. It's like they are both on a journey that forces them to look at themselves and their beliefs in a different light.
One common theme is redemption. The idea that Voldemort can be saved or changed through Harry's help. Another theme is the exploration of power dynamics. Since Harry and Voldemort have very different views on power, seeing how they interact when Harry is trying to help can be really interesting.
A common theme is also the blurring of the line between good and evil. When Harry helps Voldemort, it challenges the traditional notions of who is good and who is bad. It also often involves themes of trust. Harry has to trust Voldemort to a certain extent, and vice versa, which is a huge departure from the original story where they are bitter enemies.
Often in fanfiction, Dumbledore helps Harry understand the nature of Voldemort's soul - splitting into Horcruxes. He may guide Harry in the search for these Horcruxes. Dumbledore could also use his own powerful magic to shield Harry from Voldemort's attacks, at least until Harry is fully prepared for the final confrontation.
Common themes include the exploration of dark magic. If Harry is Voldemort, he would be more involved with dark magic, so the fanfictions often show his journey into that world. Also, the theme of redemption might be present. Even though he's in the form of Voldemort, he might try to atone for Voldemort's past deeds. And there's always the theme of how the wizarding world reacts to this strange transformation of Harry.
A frequent theme is the exploration of a different kind of relationship. Since Voldemort is now female, it could lead to a more complex emotional and psychological relationship with Harry. Also, the theme of identity is common. How does a female Voldemort view herself compared to her male counterpart? And how does Harry react to this new version of his arch - enemy? These are often explored in such fanfiction.
Another theme is the exploration of their relationship outside of the typical hero - villain dynamic. Some fanfictions show that there could be a more complex emotional bond between them. Maybe it's a begrudging respect or a strange attraction that they can't fully explain. This adds a whole new layer to the story.
Well, often there's the theme of forbidden love. Given their status as enemies in the original story, their relationship in fanfiction is something that goes against the norms of the wizarding world. Also, the theme of self - discovery is quite common. Harry and Voldemort might discover new sides of themselves through their relationship. And there could be themes related to breaking free from destiny. They were sort of fated to be enemies, but in fanfiction, they break that mold and form a relationship.
One common theme is redemption. Voldemort might be redeemed through his love for Harry. Another is the power of love to change destinies, as their relationship goes against all odds.
A frequent theme is the exploration of dark emotions. Voldemort's possessiveness is often rooted in his own dark desires, and this fanfiction delves into how that affects Harry and the wizarding world. Also, there's the theme of isolation. Voldemort tries to isolate Harry, and this becomes a major part of the story as Harry tries to break free from that isolation forced by Voldemort's possessive nature. It's like a battle between Harry's need for connection and Voldemort's need to keep him to himself.
Power is a common theme. Fanfictions often explore how Voldemort amasses and uses his power, and how others react to it. For example, some stories might show characters trying to resist his power grab.
One common theme is power struggle. Since Harry has his own power and Voldemort is power - hungry, there will be a constant fight for control over Harry's abilities. Another theme is the loss of innocence. Harry, being in such a dark situation, would surely lose his naivete quickly.
The theme of forbidden love also often appears. Given their status as enemies in the original story, the idea of them having some sort of romantic or deep emotional connection in fanfiction is a popular one. It adds an element of drama and tension to the story.