The plot of 'High School DxD Hero Light Novel' is centered around Issei. He has a lot of comical and action - packed experiences. For example, he has to train hard to become stronger in the devil world. Along the way, he makes allies and enemies. His relationships with the female characters, like Rias Gremory, are also a big part of the story. They have both romantic and strategic aspects as they fight together against different threats in the supernatural world.
There aren't many direct novels specifically tied to High School DxD Season 3. But some spin-off or companion novels might exist that expand on the story or characters.
Issei Hyodo is the main character. He is a reincarnated devil. Rias Gremory, a high - level devil and the president of the Occult Research Club, is also a main character.
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.
One interesting crossover could be the characters' powers interacting. For example, the Quirks from My Hero Academia and the Sacred Gears in High School DxD. The heroes from My Hero Academia might be intrigued by the devilish nature of the High School DxD world and vice versa. They could team up to fight common enemies that threaten both their worlds.
In a Naruto and High School DxD fanfiction, there could be a scenario where the protagonists of both stories meet in a neutral dimension. Issei from High School DxD might be intrigued by Naruto's ninja skills and determination. Naruto, in turn, could be curious about Issei's Sacred Gear. They could start training together, sharing their knowledge and skills, and ultimately have to face a common enemy that threatens both their worlds.
The heroes in My Hero Academia often have a strong sense of justice. The devils in High School DxD, on the other hand, have a more complex moral code. In fanfiction, when these two types of characters interact, it can create some really engaging stories. For instance, the heroes might try to reform the devils' ways, or the devils might show the heroes that there are shades of gray in their black - and - white view of justice. And characters like Todoroki, with his brooding nature, could have some intense interactions with the more flamboyant characters in High School DxD.