Issei is a must - include character. His growth and relationships in the original series can be further explored in a hybrid fanfiction. For example, if he had a hybrid friend or love interest, it could change the dynamics of his character development.
A fanfiction could center around a hybrid who is trying to bridge the gap between the different supernatural groups in the highschool dxd universe. They could start a club or an organization that promotes peace and understanding among devils, angels, and other beings. This would involve a lot of character development as they face opposition from traditionalists in each group who don't want things to change.
One possible plot could be that Naruto, with his unique ninja skills, is transferred to the Highschool DxD world. He could form an unlikely alliance with the main characters there. Maybe he uses his shadow clone jutsu to help out during some of the school's chaotic events or battles against the devils and fallen angels, adding a new and unexpected element to the Highschool DxD's power dynamics.
Issei is often a central character in such fanfiction. His growth and development in the original series make him a great base to build on in dragon hybrid fanfiction. Writers might explore how he would interact with a dragon hybrid character, either as an ally or a potential rival.
One idea could be an OC who is a hybrid of a devil and a fallen angel. The story could revolve around their struggle to find a place in both worlds. They might face discrimination from pure - blooded devils and fallen angels alike, but also discover unique powers that come with their hybrid nature.
One idea could be a dragon hybrid character who is trying to hide their true nature in the high school setting of Highschool DxD. They constantly have to struggle with the urges and powers that come with being a dragon hybrid while also dealing with the typical high school drama.
First, give your OC a clear backstory. For example, if it's a hybrid of a devil and a werewolf, explain how this came to be. Was it an experiment? Or a forbidden love? Then, focus on their personality traits. Maybe they're conflicted because of their two natures, like being hot - tempered like a werewolf but sly like a devil. Also, don't forget to give them unique physical features, like glowing eyes or sharp claws.
Another interesting interaction could be between Naruto and Akeno. Akeno is known for her mischievous nature. When she meets Naruto, she would be curious about his ninja skills. Maybe she would try to play some pranks on him using her magic, but Naruto, with his quick reflexes and shadow clone jutsu, would be able to turn the tables on her. This would lead to a really fun and dynamic relationship between the two characters.
Well, in these fanfictions, a common plot twist is the revelation of a unique ability. Say, the OC dragon hybrid can communicate with all types of dragons, which gives them an edge in battles and negotiations. Sometimes, the plot twists involve relationships. For instance, the OC might be betrothed to a powerful character without their knowledge, and this creates a whole lot of drama. And then there's the plot twist where the OC's dragon side is suppressing a dangerous entity, and when it's released, it changes the whole story dynamic.
A hybrid electric vehicle was a new energy vehicle that combined fuel and electricity. Its working principle was to add an electric motor as an auxiliary power to drive the vehicle. In this way, the electric motor could provide power and reduce fuel consumption when starting and at low speeds. At high speeds, the engine worked. The advantages of hybrid vehicles included fuel economy, energy saving, faster acceleration, superior driving performance, high fuel economy, and less noise. Its shortcomings were the imperfect charging infrastructure and the bottleneck of battery technology, which limited its development. Gasoline-electric hybrid cars were suitable for daily commutes and long-distance driving.