Akeno can be a popular character as well. Her mysterious nature and powerful abilities make her an interesting character to interact with the SI. She might be part of the SI's adventures, either as an ally or an unexpected challenge.
One interesting plotline could be the main character using their gaming knowledge to gain unique abilities in the Highschool DxD world. For example, they might apply strategic thinking from games to outwit opponents in battles.
Rias Gremory would be a popular choice. She's a strong and important character in the Highschool DxD world. Her leadership and power could be a great contrast or complement to the SI's gamer - like abilities. Another could be Akeno Himejima. Her mysterious nature and powerful attacks could create interesting interactions with the SI. The SI could help her unlock new abilities using their gamer knowledge.
One idea could be the SI (Self - Insert) character using their gamer knowledge to unlock unique powers in the Highschool DxD universe. For example, they might figure out a way to level - up their devil or angel abilities like in a game. Another plot could involve the SI character forming a special team with the existing characters in the series to compete in some sort of supernatural gaming tournament within the DxD world. This could bring in new challenges and alliances.
A Highschool DxD SI Gamer OC fanfiction can stand out by having a really unique SI OC design. For example, if the character has a very distinct backstory related to their gaming experience, like they were a pro - gamer in a previous life and now they have to use those skills in the Highschool DxD world. This makes the character more interesting and different from the regular characters in the series.
The adaptation of gaming mechanics into the Highschool DxD world is also really cool. The SI OC might introduce things like RPG - style leveling systems for the characters in the story. So instead of just the normal power - ups in the original series, characters could gain experience points and level up, unlocking new skills and abilities, which would change the power dynamics and the overall flow of the story.
Another good one is 'My Highschool DxD SI Adventure'. In this fanfiction, the self - insert character brings a fresh dynamic to the story. The writing style is very descriptive, making it easy to visualize the scenes and the interactions between the characters.
The combination of the 'gamer' element with the 'Highschool DxD' universe. It adds a new layer of gameplay - like mechanics to the already rich world of 'Highschool DxD'. For example, characters might gain power - ups or have to complete quests in a way that's inspired by gaming.
Finally, the writing quality matters a great deal. Good grammar, proper pacing, and vivid descriptions all contribute to making a fanfiction enjoyable. If the writing is too choppy or full of errors, it can be really off - putting. A well - written 'Highschool DxD' SI fanfiction can transport you into the world of the story and make you feel like you're right there with the characters.