First, you need to understand the characteristics of each universe. For Highschool DxD, know the different devil clans, their powers and hierarchies. In Naruto, study the ninja villages, jutsus and the chakra system. For Tiamat, research her origin and abilities. Then, create a plot that can bring these elements together. It could be a quest to save a world, or a tournament where characters from all three universes participate.
One interesting 'Highschool DxD Tiamat' fanfiction could be the ones that explore Tiamat's character in the context of the Highschool DxD universe. For example, some fanfictions might focus on her relationships with other characters like Issei. They could show how she adapts to the school environment and the chaos that often ensues in the Highschool DxD world. Another aspect could be fanfictions that delve into her powers and how they are perceived and used within the story. Maybe she uses her powers to protect the school or to help a particular character achieve their goals.
Tiamat could be developed further by exploring her relationships with other characters. For instance, if she starts to mentor a young character, it would show a different side of her. She could teach them about her powers and the history of her kind.
One possible fanfic could involve a scenario where the characters from Highschool DxD and Naruto end up in the same universe as Tiamat. Maybe the devils from Highschool DxD are intrigued by the unique powers in the Naruto world and they team up to face Tiamat. They could combine their different combat skills, like the devil's magic and Naruto's ninjutsu, to fight this powerful entity.
Another way is to join Highschool DxD - related forums or communities. People in these groups often share and recommend fanfictions. They might even have a dedicated section for 'Tiamat' - related stories. You can ask around in these communities about any good 'Highschool DxD Tiamat' fanfictions they know of, and they'll be more than happy to point you in the right direction.
Yes, there are quite a few. You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Some might focus on their unique relationship dynamic, exploring how Issei's character develops in relation to Tiamat.
One common theme is power. Since Tiamat is a very powerful being in the 'Highschool DxD' world, fanfictions often explore how Issei's power grows or is affected by his relationship with her.
One plot idea could be Tiamat adjusting to the modern world in the Highschool DxD universe. Maybe she has to deal with the different social norms and the unique magic systems there.
Well, Tiamat in her human form in fanfiction could be depicted as having a slender yet strong physique. Her skin might be pale as porcelain, giving her an almost ethereal look. She could be dressed in elegant, flowing robes that seem to move with a life of their own, and she may possess some sort of magical or supernatural jewelry that enhances her already considerable power. Maybe she has a soft, melodious voice that can charm or intimidate depending on her mood.