One idea could be exploring the backstories of minor characters in more depth. For example, you could write about the childhood of one of the exorcist trainees and how they discovered their powers. Another idea is to create an alternate universe where the main characters have different personalities or roles. Maybe in this AU, Rokuro is a powerful demon instead of an exorcist.
The story of Twin Star Exorcists Novel focuses on Rokuro and Benio. They are supposed to be the Twin Stars that will change the fate of the world full of Kegare. They train hard, fight Kegare, and deal with different challenges. Their relationship develops as they work together. They have to overcome many difficulties, like strong enemies and misunderstandings within the exorcist world. And their journey is all about getting closer to the time when they will bring the Miko into the world.
The main characters are Rokuro Enmadou and Benio Adashino. Rokuro is a bit of a rough - around - the - edges type of guy with his own set of skills as an exorcist. Benio, on the other hand, is a strong - willed female exorcist. They are the Twin Star Exorcists in the story.
It's about the story of exorcists. In this light novel, there are characters with special powers who are dedicated to fighting against evil spirits. They face various challenges and adventures in the world full of supernatural elements.
The ending of Twin Star Exorcists manga is quite complex and involves a final confrontation between the main characters and the ultimate evil. It leaves some room for interpretation.
One great Twin Star Exorcists Rokuro and Benio fanfiction is 'The Unseen Bond'. It delves deeper into their relationship outside of the main plot of the anime. It shows how they might interact during their downtime, with Rokuro trying to make Benio laugh with his silly jokes. Another interesting one is 'Parallel Paths'. In this fanfic, the author explores what would happen if Rokuro and Benio had taken different paths in their exorcist training. It gives a fresh perspective on their characters.
One common theme is the clash of different power systems. For example, when Twin Star Exorcists crosses over with Naruto, the exorcist powers and ninja jutsus create an interesting contrast. Another theme is the adaptation of characters to new worlds. In a crossover with One Piece, the Twin Star Exorcists characters have to adapt to the pirate - filled world.