Perhaps their gaming skills allow them to level up in a different way. Instead of the normal training methods in the High School DxD world, they gain power by completing in - game like quests. Each quest gives them a boost in a specific ability, like increased speed if they complete a 'race' quest.
The OC could have a special power where they can analyze opponents like in a fighting game. They can see weaknesses and strengths, just as a gamer would study an enemy's moveset. For instance, when facing a devil, they can quickly assess if the devil is more vulnerable to physical or magical attacks.
The OC can have pre - existing relationships with some of the minor characters in the High School DxD world. For example, they could be an old friend of a side character who then gets introduced to the main group. This way, it feels more natural for them to be part of the story.
Multiplayer aspects can be added too. Imagine the OC starts an in - universe gaming club where characters from different species in Highschool Dxd can compete against each other in various games. This could lead to some interesting rivalries and friendships, like a devil and an angel teaming up to win a game against a group of fallen angels.
Well, there's a fanfiction titled 'Gamer OC in High School DxD: New Rules'. In this one, the oc gamer brings a new perspective to the power dynamics in the High School DxD world. It's really exciting as it shows how the character's gaming knowledge and abilities can be used to face the challenges in that universe. Also, 'High School DxD: Gamer Revolution' is quite good, with the oc gamer leading some unique changes in the story.
A well - written one often has a believable oc character. For example, their gaming skills should be integrated realistically into the High School DxD world. Their reactions to the strange events and characters in DxD should be in line with what a gamer might do.
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 idea could be an OC who is a gamer in the High School DxD world and uses their gaming knowledge to strategize in battles. For example, they might use their understanding of RPG leveling systems to level up their own powers faster than others.
Well, in some High School DxD fanfictions, the OC might be considered Satan's son to create a really powerful and unique character. It could be for the sake of having a character with a dark and mysterious origin that can bring in a lot of interesting plot twists. Maybe the author wants to explore the idea of a character with demonic powers and a connection to the most powerful figure in the underworld, Satan.
The OC can be integrated through a common goal. For example, if the OC is a ranger from a different region but shares Aragorn's goal of protecting Middle - earth from Sauron. They can meet during a scouting mission and decide to combine their forces.
The OC should have a clear motivation that ties into Tai Lung's world. For example, if the OC is also a martial artist, they could be seeking to prove themselves against Tai Lung, which immediately creates a connection.
The OC's gamer traits can completely change the plot. If the OC is used to strategizing in games, they might come up with new plans to deal with the Philosopher's Stone situation. For example, instead of just following the traditional methods, they could think of a more complex, multi - step plan like in a strategy game.