One interesting Sairaorg fanfiction could be about his training journey in more detail. It might show how he overcomes various challenges and hones his skills further. Maybe it focuses on his relationship with other characters during this intense training period.
Issei is often paired with Sairaorg in some fanfictions. Their interactions can range from friendly rivalries to working together towards a common goal. They both have strong personalities and powers, so their joint adventures can be really interesting.
One reason is the unique self - insert (SI) aspect. It allows readers to imagine themselves in the Highschool DxD universe. The OC (original character) related to Sairaorg adds new storylines. It can bring fresh interactions with the existing characters. For example, the OC might have a special power that changes the power dynamics in the story.
There are fanfictions where a dragon in the Highschool DxD universe forms an unexpected alliance. For example, a dragon might team up with the devils against a common enemy. This can lead to some really cool battle scenes and strategic planning within the story.
One interesting story could be about Kalawarner's growth in power. In some fanfictions, she discovers new abilities and uses them to protect her friends in the dangerous world of Highschool DxD. For example, she might develop a new form of magic that no one has seen before.
Since the 'adult fanfiction' part is inappropriate, focusing on the 'High School DxD' proper, one interesting aspect is the unique power system. The Boosted Gear is a really cool concept. It not only gives Issei power but also has its own personality in a way. And the battles between different devil factions based on this power system are quite engaging.
One interesting DMC Highschool DxD fanfiction could be about a crossover where Dante from DMC enrolls in the Highschool DxD world. He might bring his unique demon - slaying skills and devil - may - care attitude, causing all sorts of chaos and also helping out in battles against other demons in the Highschool DxD universe.
In some highschool dxd phoenix fanfiction, it could be about a love story between a phoenix - like character and one of the main protagonists. The phoenix's unique nature, such as their long lifespan or their connection to fire, could create interesting plot twists in the relationship. For instance, the couple might have to deal with the fact that the phoenix character will outlive the other, leading to emotional and moral dilemmas.
In some of these fanfictions, there could be a focus on the mythology of Quetzalcoatl integrated into the Highschool DxD universe. This could lead to exciting tales where the characters have to face off against threats related to this ancient mythology while also dealing with the typical high - school drama and the battles that are characteristic of the DxD world. There might be new magical abilities or artifacts inspired by Quetzalcoatl that change the course of the story.
A great Rias fanfiction could focus on her relationships outside of the main group. Maybe she befriends a human who has no knowledge of the supernatural world. It would be interesting to see how she tries to protect this new friend while also hiding her true identity as a devil.
One interesting story could be where the main character discovers a mysterious watch that gives him unique powers within the Highschool DxD universe. This watch might allow him to control time in battles or gain insights into the hidden secrets of the different factions.