Another plotline could be that Naruto is already in a version of the Highschool DxD world that has been corrupted by Rias's rule. He then embarks on a journey to find the source of her power and a way to break it. Along the way, he meets various characters who either oppose or support Rias. Naruto has to use his wits and his ninja abilities to outsmart Rias and her minions while also trying to win over the hearts of the people who have been under her influence.
Perhaps Naruto is sent to the Highschool DxD world as part of a mission or some sort of magical accident. He discovers that Rias is using her position to take advantage of weaker characters. Naruto, being the hero he is, decides to put a stop to it. He challenges Rias to a series of duels or competitions where the loser has to change their ways. This would create a lot of tension and drama in the story.
One possible plotline could be that Naruto is transported to the Highschool DxD world and immediately notices Rias's overbearing attitude. He decides to oppose her and starts to gather allies among the other students and characters who are also fed up with her ways. As a result, a power struggle ensues between Naruto and Rias.
He might react with hostility. Dark Naruto has a certain edge to him, and if he sees Rias as a threat or someone he doesn't like, he'll likely oppose her. He could use his combat skills to challenge her directly.
Well, in such a fanfiction, Dark Naruto might use his powerful and often shadowy abilities to outwit Rias. Maybe he'd expose some of her less - than - noble actions in the Highschool DxD world. He could easily overpower her in battles, using his ninja skills and the dark powers he has. For example, his shadow clones could be used to confuse Rias and her peerage while he strikes from the shadows.
Well, it could involve Naruto characters being thrown into the Highschool DxD universe and having some sort of conflict with Rias. Maybe Naruto's skills and values clash with Rias's actions or leadership in the story. For example, Naruto might see her as too power - hungry or not treating her underlings fairly.
Well, one interesting aspect could be the exploration of different character dynamics without Rias being in a central positive role. It might show how other characters develop in a new light. For example, other devils or supernatural beings could step up and show their capabilities more prominently.
Often, there's a theme of challenging the status quo that Rias represents. In the original, she has a certain position and set of relationships. Fanfictions might bash her to create a new narrative where the OC can break free from the typical Rias - centric storylines. For example, if Rias is seen as too controlling in the original, the fanfic could have the OC resist her authority and form new alliances or ways of doing things.
In some cases, it could be that the author of the fanfiction simply wants to explore a different narrative where Rias is not the 'perfect' character she is often portrayed as in the main series. They might want to create a more complex or alternative view of the Naruto DxD universe by highlighting what they see as flaws in Rias's character.
Well, one possible plotline could be Naruto, in the form of a hound, somehow gets transferred to the Highschool DxD world. He might have to deal with the different factions and powers there while still retaining some of his Naruto - like abilities.
One possible plotline could be Naruto being transported to the Highschool DxD world and having to adapt to its unique rules and social hierarchy. He might use his ninja skills to rise through the ranks in the school. Another could be that Naruto's presence disrupts the existing power balance in the DxD world, leading to various conflicts and alliances. Maybe the devils and angels in the DxD world are intrigued by Naruto's power and try to either recruit him or eliminate him.
One potential new protagonist could be Issei's other friends or comrades. Since Rias is being bashed in this type of fanfiction, they might get more screen time and development. For example, Kiba could step up and show his leadership skills and unique abilities more.
One common theme could be power dynamics. Since it's a Rias - bashing fanfiction, it might explore how a human OC challenges Rias' authority or power within the Highschool DxD universe. Another theme could be the exploration of different character relationships. The human OC may interact with other characters in ways that contrast with how Rias does, leading to new and interesting story developments. It could also deal with the concept of loyalty, as the OC might sway the loyalty of characters who were previously on Rias' side.