The theme of destiny is quite common. Itachi might believe that Naruto is part of some greater destiny, and his own actions are somehow intertwined with Naruto's. In these fanfictions, Itachi's obsession can be a driving force in fulfilling that shared destiny. Additionally, the theme of understanding is there. Itachi tries to understand Naruto's unique power and personality, and through this understanding, his obsession grows.
One common theme is unrequited love. Itachi may be pining for Sakura while she is oblivious or has feelings for someone else. Another theme could be sacrifice, where Itachi's feelings for Sakura lead him to make sacrifices he wouldn't otherwise make.
Love and protection are very common. Itachi is often depicted as a very protective figure towards the reader. He will go to great lengths to keep the reader safe from harm, whether it's from his own clan's enemies or other threats in the Naruto universe.
One common theme is redemption. Since Itachi has done some controversial things in the original story, many fanfictions focus on him finding redemption through his interactions with Naruto. Another theme is friendship. Naruto has a way of befriending almost everyone, and in fanfictions, this friendship with Itachi is often explored.
One common theme is mentorship. Since Naruto admires Itachi, it often shows Itachi as a sort of mentor figure to Naruto, guiding him in different ways. For example, teaching him about the importance of sacrifice for the greater good.
One common theme is friendship. Gaara, being initially a rather isolated character, finds something special in Naruto's friendly nature. His obsession often stems from a desire to understand and be part of that friendship.
One common theme is the power struggle. Since Itachi is a vampire, he has powers that Naruto may not fully understand at first. This creates a dynamic where they have to figure out how to work together without one overpowering the other.
The theme of identity also plays a big role. The female Itachi may struggle with her identity as she is different from the male Itachi that everyone in the Naruto world knows. Naruto, who has his own identity issues at times, can relate to her. This exploration of identity often leads to deep and meaningful conversations between the two characters in the fanfiction.
One common theme is redemption. Itachi has a lot of guilt in the original series, and in yaoi fanfiction, Naruto can often be a source of redemption for him, helping him come to terms with his past actions.
In 'naruto female itachi fanfiction', a frequent theme is the female character's impact on Itachi's life, even if it's just in a small way. It could be that she makes him question some of his decisions or gives him a new perspective. Another common theme is the power dynamic between them. Depending on the nature of the female character, she could be more powerful, less powerful or equal in power to Itachi, and this affects their interactions. And of course, the theme of loyalty, both to their respective causes and to each other, is often explored as well.
One common theme is redemption. Many fanfictions focus on Itachi's actions that were seen as bad initially but are later redeemed through his relationship with Naruto. Another theme is mentorship. Itachi often acts as a mentor to Naruto in these stories, guiding him in his growth as a ninja.