One characteristic is the focus on Akeno's character development. Writers often explore her complex personality, from her demure side to her more assertive and powerful self.
I find Issei to be quite interesting in fanfics related to Akeno. His interactions with Akeno, whether it's as friends or something more, often add a lot of depth and drama to the story.
One great fanfic could be 'Akeno's Adventure in Highschool DxD'. It explores Akeno's character in more depth and her relationships within the Highschool DxD universe. It has interesting plot twists and character developments that make it a really engaging read.
In certain fanfictions, fallen angels may act as antagonists. They could be trying to disrupt the relationship between Akeno and Issei or simply cause chaos in the devil world where they live.
One popular highschool dxd akeno fanfiction is 'Akeno's Ascent'. It focuses on Akeno's growth in power and her relationships within the highschool dxd universe. Another one is 'Akeno's Heart', which delves deeper into her emotions and past traumas.
I'm not sure if there is specifically such a fanfiction. There are a vast number of fanfictions out there for Highschool DxD, and while some might explore different relationship developments for Akeno, it's difficult to say for sure if there's one about her being pregnant. You could try searching on some popular fanfiction websites.
One interesting plot could be Akeno and Issei going on a secret mission together. They face various challenges and their relationship deepens during the process.
It could explore the reactions of the other characters. For example, how would Issei, her friend or love interest, react to the news? It might also look into how Akeno herself copes with the situation, given her character traits in the original series. Maybe it would show her becoming more protective or having new fears.
A fanfiction could explore their past. For example, how they first met in the underworld. It could show their initial impressions of each other and how their relationship developed over time. Perhaps there was some sort of competition between them at first, but they later realized they could be great friends and allies. This would give readers a deeper look into their characters.
Another storyline could involve the male reader having a special power that Akeno is drawn to. Maybe he can control an element that is rare in their world. Akeno wants to learn more about it and in the process, they train together. This training brings them closer, and they start to develop feelings for each other. However, there are those who want to use the male reader's power for their own evil purposes, and Akeno and the male reader have to fight against them while also dealing with their newfound emotions.