The theme of adaptation is very common. Akeno has to adapt to the new rules, the new magical system, and the different types of people in the Harry Potter world. In some fanfictions, there is also a theme of love, where she might develop romantic feelings for one of the characters in the Harry Potter world, which adds a new layer of complexity to the story.
One common theme is the clash of cultures. Akeno comes from a different fictional universe, and when she enters the world of Harry Potter, there are differences in magic, social norms, and values that create interesting situations. Another theme is friendship. She forms new friendships with the characters in Hogwarts, and these relationships are often central to the story.
One common theme is the exploration of different power systems. Since Naruto has his ninja powers and Akeno has her own abilities from her world, fanfictions often focus on how these powers interact. For example, they might have to combine their powers to defeat a powerful foe.
A common theme is friendship. The stories often explore how Akeno and the OC become friends and support each other. Another theme is self - discovery. The OC might be on a journey to find themselves and Akeno helps in that process.
One common theme is romance. Given the idea of Issei kissing Akeno, the fanfictions often explore their relationship in a romantic context, with all the typical romantic elements like love confessions, dates, and relationship development.
One common theme is the development of their relationship. Since they often start with a certain dynamic in the original source, fanfictions like to explore how that relationship deepens and changes over time.
One common theme is the exploration of relationships. For example, romantic relationships between characters that were not fully explored in the original books, like the relationship between Harry and Hermione. Another theme is the expansion of the magical world, such as new spells or magical creatures. Also, there are fanfictions that focus on the backstories of minor characters, giving them more depth and significance.
Love and sacrifice are also prevalent themes. We see how the love of Lily Potter saved Harry in the original series, and fanfiction often expands on this idea of love being a powerful force. There are also fanfictions that explore the idea of redemption for characters like Draco Malfoy, showing that even those on the wrong side can have a chance at changing and making amends.
One common theme is adventure. Combining the action - packed world of 007 with the magical adventures of Harry Potter makes for some thrilling stories.
One common theme is the clash of their cultures. Naruto comes from a world of ninjas with strict codes and values, while Akeno has her own background. Another is the idea of them being outcasts in some ways and finding solace in each other.
Another theme is adventure. Since Highschool DxD has a lot of action and supernatural elements, fanfictions might have Issei and Akeno going on adventures together, facing powerful enemies and overcoming challenges as a team. They could be fighting against other devils, angels or fallen angels in these stories. And often, these adventures also contribute to the growth of their relationship.
Often, a common theme is the clash and then the melding of their two different cultures. Naruto's world has the ninja villages, honor, and chakra, while Akeno's world has the devils, angels, and different power hierarchies. In the context of a 'lemon' fanfiction, there may also be themes of passion and desire that are more emphasized due to the nature of the 'lemon' genre, which often includes more romantic or sexual undertones.