One possible plot could be that the OC gamer, being a huge fan of the Highschool DxD world in his own gaming realm, somehow gets transported into the world. He then meets Raynare. Maybe at first, Raynare tries to use him for her own purposes as she usually does. But as the story progresses, the gamer's unique skills from his gaming world start to change her perception of him. For example, he might be able to analyze situations like he does in games and come up with strategies that no one in the Highschool DxD world has thought of. This could lead to an interesting dynamic between them, with Raynare slowly starting to trust the gamer and they end up on some kind of adventure together.
Perhaps the OC gamer is a master of strategy games. In the Highschool DxD world, he uses his skills to form alliances. He meets Raynare, who is initially an enemy. But the gamer realizes that she has been misjudged by others. He tries to recruit her into his alliance. Raynare is hesitant at first, but as she sees the gamer's plans unfold and how they could benefit her, she decides to join. Together, they take on powerful foes in the Highschool DxD world, with the gamer's gaming knowledge and Raynare's powers making them a formidable team.
The plot could involve the OC gamer having a special ability to see the stats of characters in the Highschool DxD world, like in a game. When he meets Raynare, he discovers that she has some hidden stats or powers that no one else is aware of. He then tries to convince her to use these powers for good instead of her usual villainous ways. Along the way, they face various challenges from other characters who don't trust the gamer or Raynare's new direction. It could be a story of redemption for Raynare and the gamer finding his place in this new and dangerous world.
The OC gamer could fit in by bringing a fresh perspective. For example, he might introduce new technologies or ways of thinking based on his gaming experiences. With Raynare, he could start by trying to understand her motives. Maybe he offers her a deal where she helps him navigate the world in exchange for something she wants. This way, he can gradually build a relationship with her and find his place in the world.
One idea could be an OC who is a gamer and discovers a hidden power within the Highschool DxD universe while playing a virtual reality game related to it. This power could be something unique like the ability to control shadows in the DxD world.
An interesting plot could be an OC gamer who is known for their role - playing skills in the human world. When they enter the Highschool DxD world, they start to role - play as a powerful being. This act fools many of the characters at first, but as time goes on, they have to actually become strong to keep up the facade and end up changing the power dynamics in the DxD world.
One idea could be an OC with a unique gaming ability that allows them to level up their magic skills faster in the DxD world. For example, they could have a 'gaming HUD' that shows hidden stats of enemies, giving them an edge in battles.
Well, I really like 'Raynare's Secret Past' in the Highschool DxD Raynare Fanfiction world. It delves deep into her backstory, which was not fully explored in the original anime. It gives reasons for her actions and makes her a more complex and sympathetic character. There are also some that focus on her relationships, like 'Raynare and Issei's Unlikely Bond' which shows an unexpected connection between them.
The popularity of Highschool DxD Raynare Fanfiction lies in her complex character. In the original series, Raynare has a lot of mystery. Fanfiction writers can explore her backstory, motives, and what could have been different for her. For example, they can show a side of her that was perhaps hidden in the main story.
The OC's backstory as a gamer is crucial. Maybe they were a bullied gamer in the human world but in the Highschool DxD world, they find a new sense of purpose and power. Their journey from being an underdog gamer to a powerful figure in the DxD world can be very memorable. Also, give them some quirks like always quoting game lines at inappropriate times which adds humor and memorability.
One plot idea could be that the Magic Gamer OC discovers a hidden connection between the worlds of Highschool DxD and Fate. They then embark on a journey to uncover the secrets behind this connection, facing challenges from both sides. For example, devils in Highschool DxD might see their investigation as a threat, and mages in Fate might try to use them for their own purposes.
The plot might center around the fairy OC trying to fit into the world of Highschool DxD. Since she's a fairy, she could bring a new element of magic and mystery. For example, she could be on a quest to find a lost fairy artifact in the Highschool DxD universe, which leads her to interact with different characters and form alliances or rivalries. She might also have to deal with the fact that fairies are not common in that world and face some prejudice or misunderstanding from other characters.
Well, it could be about the OC, as the son of Thor, coming to the Highschool DxD world and showing off his godly powers. Maybe he'd have to deal with the various factions in the school, like the devils, angels and fallen angels, while also trying to fit in.