In a Highschool DxD fanfiction with an OC as a Dragon God, you can give the character a unique weapon. It could be a sword made from dragon scales that has the ability to cut through any magic. Their origin could be from a different dimension where dragon gods are the rulers. This would make them have a different perspective on the Highschool DxD universe. Their relationship with the other characters could start with mistrust but develop into alliances as the story progresses.
Well, for creating an OC (Original Character) as a Dragon God in a Highschool DxD fanfiction, first think about their powers. A Dragon God could have the power of elemental manipulation, like controlling fire or ice. Their appearance could be a mix of human and dragon features. Maybe they have dragon wings that can be hidden at will. Another important aspect is their backstory. They could be an ancient being that has just awakened in the modern Highschool DxD world.
One idea could be to create an OC who has a Sharingan that has unique abilities. For example, instead of just the normal powers like predicting movements, it could have the ability to see through illusions created by devils in the Highschool DxD universe. The character could be a transfer student, perhaps from a hidden clan that has a connection to both the Naruto world (where Sharingan is from) and the Highschool DxD world. Their backstory could involve some sort of experiment or curse that led to them having the Sharingan.
A good plot idea could be that the OC Dragon God has to hide their true identity in the high school. They are there to find a certain magical item that is hidden in the school. As they search, they get involved with the main characters and have to deal with the normal high school drama as well as the supernatural threats that come their way.
The OC's abilities related to Divine Dividing could be developed in different ways. They could start with basic power - splitting physical objects. As the story progresses, they learn to split intangible things like magical barriers or even the auras of other powerful beings. This growth in power can be tied to their emotional and mental development throughout the fanfiction.
A plot could revolve around an OC Dragon God who forms an unlikely alliance with Issei. They could team up to face a greater threat that neither the devils nor the angels are fully aware of. The OC could bring in their unique dragon god powers and knowledge to help Issei level up in a different way, adding a new dynamic to the story.
Well, an interesting plot might involve an OC Dragon God who has lost their memories and has to rediscover their powers and identity while interacting with the characters in Highschool DxD. They could start off as a seemingly ordinary student, but as the story progresses, strange things start to happen that hint at their true nature. Also, an OC Dragon God could come from a different dimension and bring with them unique powers and knowledge that change the dynamics of the Highschool DxD world. Maybe they have a special connection to one of the main characters that has been fated since long ago.
For character development, the mute OC might struggle with feelings of isolation at first. But as the story progresses, they could form deep bonds with other characters who learn to understand them in unique ways. For example, a character might be able to sense their emotions, leading to a really heartwarming friendship.
One idea could be a dragon OC that has the ability to transform into different elemental forms. For example, it can be a fire - breathing dragon in combat situations, but a water - based dragon for healing or stealth purposes. This would add an interesting dynamic to the story as it could befriend different characters based on its form.
One idea could be an OC who is a dragon slayer but has a unique power that sets them apart. For example, they can absorb the powers of the dragons they slay instead of just killing them. This could lead to all kinds of new storylines as they become more powerful and are hunted by both good and bad forces in the Highschool DxD universe.
To create a believable character, start with a clear backstory. For example, if the OC Dragon God is from a long - lost dragon clan, explain how that clan influenced their values and powers. Also, give them flaws. Maybe they are overly proud because of their dragon heritage, which often gets them into trouble. Their appearance should also match their dragon nature, like having dragon - like eyes or a small dragon mark on their body.
Start with their backstory. Decide where they came from, how they became a dragon slayer. Were they trained by a master? Or did they have a personal vendetta against dragons? This will shape their personality.