The mystery plots in the Seitokai Tantei Kirika light novel could be highly original. Instead of using the same old mystery tropes, it might present fresh and unexpected cases. The way the detective in the story approaches these mysteries, using her knowledge of the school and its inhabitants, could be a unique selling point. Additionally, the light novel may have a great writing style that effectively conveys the atmosphere of the school and the tension of the mystery - solving process.
The characters in Seitokai Tantei Kirika might be what sets it apart. If they are well - developed with distinct personalities and motives, they can draw readers in. For example, if the detective character has an interesting backstory or a unique way of solving mysteries, it makes the story more engaging. Also, the relationships between the characters, whether it's a budding romance or a strong friendship within the student council, can add depth to the story.