A common theme is also the exploration of different power systems. Instead of the traditional devil - based powers in High School DxD, fanfic writers might create new power systems for the characters. This could involve elements from nature or different mythologies, which can lead to exciting new adventures and challenges for the characters.
Some fanfictions focus on backstories. They might delve into the past of a character like Issei and create a more detailed and perhaps different origin story for them. There are also fanfictions that revolve around crossovers with other popular series. For instance, a crossover with a magical girl series could bring a whole new dynamic to the High School DxD universe, creating interesting and unique storylines.
One popular theme is the combination of different magic systems within the High School DxD universe. For example, mixing the traditional magic of the devils with magecraft from other sources.
One popular theme is crossover. Writers often combine the two universes, like having the characters from My Hero Academia attend the school in High School DxD or vice versa. Another common theme is power - up. Fans like to write about their favorite characters getting new powers or improving their existing ones. Romance is also a big theme, especially pairings that might not be canon in the original series.
Some common themes are love and loyalty. Since it's a fanfiction about Issei and Yubelluna, their relationship could be explored in terms of how deep their love grows and how loyal they are to each other. Also, the theme of redemption can be present. Maybe Yubelluna has a past she wants to atone for and Issei helps her through it. Additionally, the theme of friendship within the context of their relationship can be explored, like how they support their friends while also focusing on their own relationship.
One popular theme could be Issei's growth in power with the influence of sunshine. Maybe in the fanfiction, the sunshine represents some kind of special energy that enhances his abilities. Another theme might be his relationships with other characters in the context of this sunshine element. For example, how his interactions with Rias or other members of the Occult Research Club change because of it.
Another type of non - inappropriate fanfiction could be those that center around the different factions in High School DxD. It could be about how they interact and cooperate in the face of a common threat. This kind of fanfiction can be really interesting as it delves into the politics and power dynamics of the High School DxD universe.
Some popular themes include the power dynamics within the harem. For example, some members might be more powerful than others, and how they use or don't use their power in the relationship is interesting. Additionally, the cultural and mythological elements from the 'High School DxD' universe are often explored in these fanfics, such as different demon clans and their traditions.
Well, a common theme is his battles. Fanfiction could detail his epic battles against Goku or other strong opponents from a strategic and action - packed perspective. His character development is also a theme. For instance, how he might change his view of the universe and other species after his multiple defeats. Additionally, his exploration of new planets and his encounters with different civilizations can be a theme, all without any adult elements.
Some fanfictions also focus on Tifa's backstory. They might explore her childhood, how she grew up and trained, and how those experiences shaped the person she became in the main story. This gives readers a deeper understanding of her character.
One popular theme is exploring Bayonetta's backstory in more detail. Fans often write about her training as a witch, her relationships with other characters from her past, and how she developed her unique fighting style.
Rather than'shotacon' fanfiction, there could be fanfictions that explore the unique powers and abilities of the different characters in 'High School DxD'. For instance, fanfictions about Rias and her leadership skills in the Gremory group, or about Akeno's relationship with the other members in a more friendly and positive way, without any unethical undertones.