Identity is also a big theme. Tobi's true identity is often a mystery in his original story, and in crossovers, this mystery can be further explored or even used as a plot device. For instance, in a crossover with the Sherlock Holmes universe, Holmes might try to uncover Tobi's real identity.
Conflict is a very common theme. Whether it's a conflict between Tobi and the heroes or villains of the other universe, or a conflict within Tobi himself as he faces new situations. In a crossover with the Star Wars universe, Tobi could be in conflict with the Jedi or Sith over his goals and actions.
One common theme is power exploration. Since Tobi has unique powers, in crossovers, writers often explore how his powers compare and interact with the powers in the other universe. For example, in a crossover with the Dragon Ball universe, his stealth abilities might be pitted against the ki - sensing abilities of the Saiyans.
Common themes include the idea of changing the course of the Naruto story. With Naruto being related to Tobi in some way in these fanfictions, it can lead to different outcomes for the ninja world. For example, they could team up against a greater threat that wasn't in the original plot. There's also the theme of uncovering secrets, as Tobi has many secrets, and Naruto could be the key to revealing them all.
Another theme is often the discovery of new magic or secrets. Since Tobi is an outsider in a way, he might stumble upon things that the regular Harry Potter characters haven't. This could be a hidden spell, a lost artifact, or a secret chamber. And this discovery then drives the plot forward as he has to deal with the consequences of it.
One common theme is the exploration of identity. Since Tobi is often a mysterious character, a female Tobi in fanfiction might struggle with her true self while interacting with Naruto. Another theme is friendship or even a potential romantic relationship. Writers like to play with the idea of how two very different characters like Naruto and a female Tobi could form a bond.
Love and friendship are also common themes. Some stories explore the budding romance between the reader and Tobi, how they fall in love despite the challenges. Friendship is also there, like when the reader becomes Tobi's closest confidant. Additionally, there can be themes of redemption. If Tobi has done some bad things in the original story, the fanfiction might show how the reader helps him redeem himself.
The theme of redemption is also seen quite a bit. Tobi may have made mistakes in the past, but through love, he is able to redeem himself. It gives the story a positive and hopeful tone, showing that love can be a powerful force for change.
Often, there are themes of self - discovery. Sakura and Tobi may each be on a path to learn more about themselves and their powers or abilities. Also, themes of mystery can be present. For example, there could be a mystery surrounding Tobi's true identity that Sakura helps to uncover. And sometimes, there's a theme of redemption, where one of the characters has made mistakes in the past and is trying to make up for it through their relationship with the other.
One common theme is discovery. Tobi discovers new things about the female reader and vice versa.
One common theme is redemption. Since Obito has a dark past in the Naruto series, in many fanfictions, the OC helps him find a path to redemption. Another theme is love against all odds. Their relationship often has to overcome obstacles like Obito's loyalty to his original goals or differences in their villages.
Another common theme might be the idea of secrecy and forbidden love. Given that yaoi involves same - sex relationships and in the Naruto world, which is more focused on traditional ninja relationships, their relationship could be seen as something that has to be hidden. This can add an element of tension and drama to the fanfiction. There could also be themes related to personal growth for both characters as they navigate their relationship.
A very common theme is the clash of personalities. Tobi is often depicted as this somewhat unpredictable and shadowy figure, while Sakura is strong - willed and determined. So, their interactions are full of tension. Also, the theme of trust - building is quite prevalent. In many fanfics, Sakura has to learn to trust Tobi despite his mysterious nature.