Often, the unique feature is the blend of the red dragon concept with the existing highschool dxd lore. For example, the red dragon might bring in new powers or abilities that the regular highschool dxd characters don't have.
One interesting storyline could be the Red Dragon Emperor exploring new powers. For example, he might discover a hidden aspect of his Boosted Gear that allows him to access a different form or ability. This could lead to him having to train in new ways and face challenges that he wasn't prepared for before.
One great 'highschool dxd red dragon fanfiction' is 'The Red Dragon's Ascent'. It has an interesting plot where the main character, who has a connection to the red dragon, goes through various challenges in the high school dxd world and discovers new powers along the way.
Akeno Himejima is also a favorite. Her dual - nature, being both sweet and having a darker, more sadistic side in battle, adds depth to her character. In fanfiction, she can have different interactions with the Red Dragon Emperor, from being a close ally to a potential love interest.
One popular storyline could be the OC's struggle to control the power of the Red Dragon Emperor. For example, they might face challenges in taming the intense and sometimes uncontrollable power within them. Another could be their relationships with the existing characters from Highschool DxD. They might form alliances or rivalries with Rias and her peerage. Also, a story could revolve around the OC uncovering secrets related to the Red Dragon Emperor heritage that were previously unknown, leading to new adventures and battles.
Great Red is also a very popular dragon in Highschool DxD fanfiction. Given his mysterious and powerful nature, many fanfictions explore his potential influence on the main characters' lives and the overall plot of the story. His abilities are often expanded upon in these fan - created works.
One great Highschool DxD Dragon Issei fanfiction is 'Issei's Ascent'. It really delves into Issei's growth as a character while also exploring his dragon powers in a unique way. Another interesting one is 'Issei and the Dragon Realm' which takes Issei on an adventure into the dragon realm and shows his interactions with different dragon species there.
First, give your OC a unique backstory related to the Red Dragon Emperor power. Maybe they didn't inherit it in the traditional way, or there was some sort of prophecy involved. Second, define their personality traits clearly. Are they more hot - headed like Issei in some ways, or are they calmer and more calculating? Third, think about their goals. It could be something as simple as becoming the strongest in the school or something more complex like uniting all the different supernatural races. And don't forget to give them some flaws, like being overly confident at times which can get them into trouble.
Another theme is mystery. Great Red is not fully understood in the original series, and fanfictions like to play with that. They might create stories where characters are trying to uncover the secrets of Great Red, like its origin or its true intentions. This can add an element of intrigue to the story.
Well, it depends on what you consider 'good'. There could be fanfictions that blend the elements of Naruto and Highschool DxD in creative ways. For example, some might have Naruto's ninja skills interacting with the supernatural elements of Highschool DxD. However, you may need to sift through a lot of them to find the ones that really stand out in terms of plot, character development, and writing quality.