Goku's powers are on a completely different level compared to most characters in Highschool DxD. His Saiyan abilities like Super Saiyan transformations give him incredible strength, speed, and energy projection. In contrast, the characters in Highschool DxD mainly rely on magic and their devil or angelic powers which, while powerful, are not on the same scale as Goku's in terms of raw power. For example, Goku could easily defeat most low - level devils with a single punch in his base form.
The Highschool DxD manga has indeed finished. It wrapped up after completing all the planned story arcs and providing a satisfying conclusion for the readers.
In this fanfiction, Shirou might be seen as an enigma. His calm and collected demeanor would be different from the more boisterous characters in Highschool DxD. He could potentially be a mediator between the different groups, given his own experiences with complex moral situations in the Fate series.
In many 'Highschool DxD' fanfictions, Issei's character development is a central focus. His first experiences, whether it's in battles, relationships, or other aspects, are often explored in different ways by different authors. Some fanfictions might take a more comical approach, while others could be more serious and in - depth. Without more specific details, it's hard to say exactly what that particular fanfiction about his first experience might be like.
In this fanfic, Riser and Kuroka might find themselves in a race against time. They could be competing with other factions in the Highschool DxD world to reach a certain place first. Maybe it's a place full of ancient magic that could give them an edge. Their different abilities would play a crucial role. Riser's fire - based powers and Kuroka's unique nekoshou skills would be used in creative ways to overcome obstacles.
I'm not really into such specific and rather inappropriate topics in fanfiction. However, in general, in Highschool DxD, Issei's character experiences many growth and development aspects throughout the story that are more suitable for general discussion, like his growth as a fighter and his relationships with other characters.