Protection is also a big theme. Asia is often depicted as a kind - hearted and somewhat naive character. So, Issei protecting her from various threats, whether it's other devils or supernatural beings, is quite common. This also serves to show his loyalty and love for her in the fanfictions.
Power - up themes are also common. Since Issei has his own power progression in the original series, fanfictions might explore how he and Asia grow in power together. Maybe they train together or discover new abilities as a team. And of course, there are the slice - of - life themes. These stories show their daily lives at school or in the supernatural world, dealing with normal and not - so - normal problems.
Another theme is her growth in power. Many fanfictions explore how Asia becomes stronger and how that affects her relationships with other characters like Issei. For example, in some stories, as she gains power, she also gains more confidence and is able to stand up for herself more. It's really interesting to see how her character develops in different ways in these fan - created stories.
The theme of self - discovery is also common. Issei in many fanfictions is on a journey to find out more about himself, his place in the world, and his true potential. And of course, the theme of the supernatural world and all its elements like magic, different species, and ancient secrets is often a big part of these fanfictions as it was in the original Highschool DxD.
One common theme is power. Since both Naruto and Highschool DxD have complex power systems, fanfictions often explore how the characters' powers compare or combine. Another theme is friendship. Characters from both universes might form new friendships or rivalries.
One common theme is power escalation. Since Issei is OP in these fanfictions, the story often focuses on how he continues to gain and control his ever - increasing power. Another theme is harem - related, as in the original Highschool DxD, Issei has a harem. In the fanfictions, his OP status might attract even more characters to his harem, and the dynamics within the harem change because of his new power level.
Well, often in Highschool DxD Issei bashing fanfiction, a common theme is power redistribution. Since Issei is a central figure in the original in terms of power - up and his role in battles, these fanfictions might shift the focus to other characters getting stronger or more important in different ways. It could also be about changing the overall tone of the story. Instead of Issei's more comical and pervy attitude driving parts of the plot, the fanfiction might have a more serious or different comical approach by removing or reducing his presence.
Power - up themes are also quite common. Issei often gets new powers or abilities, and Rias may play a role in that. For example, in some fanfictions, Rias helps Issei to master a new form of his Sacred Gear. This not only strengthens Issei but also deepens their bond as they train together. Another aspect is the exploration of the supernatural world in the context of their relationship. Since Highschool DxD has a rich supernatural setting, fanfictions may expand on this, like how Issei and Rias face new threats from the underworld or other dimensions together, which further cements their relationship and showcases their individual growth.
Romance is also a big theme. Just like in the original Highschool DxD, his son usually has his own love interests. These relationships can be complicated by his status as Issei's son. Sometimes, potential partners are attracted to him because of his family name, and he has to figure out if their feelings are genuine.
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.
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.