Most BSD light novels often have complex characters. Since they are based on literary figures, they bring in the depth and complexity of those original personas. For example, a character might have the same traits as a famous writer but with a unique twist for the BSD universe.
In many Ranpo light novels, Akechi Kogoro is a main character. He is a brilliant detective with sharp observational skills and a logical mind, often solving complex mysteries.
The Ranpo light novel 'Jigoku no Houteishiki' (The Formula of Hell) is also quite popular. It delves deep into the psychological aspects of its characters. With its detailed descriptions and unexpected twists, it keeps the readers on the edge of their seats.
One great Ranpo fanfic is 'The Case Solver'. It really delves into Ranpo's brilliant detective skills. The author does an amazing job of portraying his character, making him seem even more intelligent and perceptive than in the original series. Another good one is 'Ranpo's Day Out' which shows a more light - hearted side of him, with humorous interactions with other characters from the Bungou Stray Dogs universe.