A less obvious theme can be cultural differences. Elmenhilde might come from a different background than Issei. In some fanfictions, this is explored in depth. They might have different values or ways of doing things, and seeing how they overcome these differences and come together can be really engaging. For example, one fanfiction might show how Issei's more laid - back attitude clashes with Elmenhilde's more formal and traditional ways at first, but then they find a middle ground.
Power and responsibility are also common themes. Since Highschool DxD has a lot to do with supernatural powers, in fanfictions with Issei and Elmenhilde, they often have to deal with the power they possess and the responsibility that comes with it. For example, they may have to use their powers to protect the school or the innocent. And there's the theme of loyalty. They show loyalty to each other, their friends, and their respective factions, which is often explored in different ways in different fanfictions.
There's also a fanfiction called 'Issei and Elmenhilde: A New Alliance'. Here, the story focuses on how they form an alliance to bring about peace between different factions in the Highschool DxD universe. The story is filled with political intrigue and some really sweet moments between Issei and Elmenhilde as they learn to trust each other and work towards a common goal.
One common theme is his relationships, whether it's with his friends or potential romantic interests. Another is his growth as a character, in terms of strength and maturity.
One common theme is his growth as a character. Fans often like to write about how Issei becomes stronger both physically and mentally. Another theme is his relationships, whether it's his romantic relationships or his friendships with other characters in the series.
Themes like love and friendship are quite common. Their relationship can be seen as a blend of both. There's also the theme of self - discovery. Issei, for example, discovers more about his powers and his place in the supernatural world. Rias also has her own journey of self - realization. Additionally, the theme of protecting what they cherish, like their friends and the world they live in, is often explored in these fanfictions.
One great 'Highschool DxD Godlike Issei' fanfiction could be 'Issei's Ascent'. It often features Issei achieving new levels of power in really cool and unexpected ways. Another is 'Godlike Issei: New Beginnings' which focuses on Issei making different choices early on in the story that lead to a whole new set of adventures. And 'The Godlike Issei's Realm' is also popular as it delves into Issei creating his own unique realm with his newfound powers.
There might be a fanfiction where Fem Issei has a special power that only she, as a female version of Issei, can possess. For example, she could have a more refined form of the Boosted Gear that is attuned to feminine energy. This could lead to new storylines and battles that deviate from the original plot. She may also form unexpected alliances with other characters based on this new power.
One characteristic is the deepening of their emotional bond. These fanfictions often show their love story in different ways. Some might start from a friendship that slowly turns into a romantic relationship. Others may jump right into a more intense romantic scenario. Also, the fanfictions usually incorporate elements from the Highschool DxD universe, like the different factions and the power struggles, but with a focus on Issei and Rias's relationship within that context.
One interesting fanfiction could be where Female Issei has to face unique challenges in the supernatural world that are different from the male Issei in the original series. For example, she might have to deal with discrimination in a male - dominated underworld society.
There's a fanfiction where Smart Issei focuses on forging alliances. Titled 'Issei the Strategic Mastermind', he forms unique bonds with different factions. By using his intelligence, he's able to predict their needs and wants, thus creating a more stable and powerful network. This fanfiction shows a different side of Issei compared to the original series.
Well, 'A Different Highschool DxD Issei Harem' is quite well - known. In this fanfiction, the author gives a unique take on how Issei forms his harem, with different character interactions compared to the original story. There's also 'Issei's Harem: The Unseen Tales' which reveals some unseen aspects of the relationships in Issei's harem.