I think the story in SMT IV is good. It has a depth to it that makes you think. The world-building and the way the narrative unfolds are both impressive.
The characters in 'smt nocturne' light novels are likely to be diverse and multi - faceted. They may have distinct personalities, goals, and backstories that contribute to the overall story. Also, the plot could be filled with twists and turns. It might involve elements of mystery, adventure, or even moral dilemmas. This keeps the readers engaged and guessing about what will happen next. Moreover, the writing style might be vivid, using detailed descriptions to bring the story to life, whether it's the scenery, the characters' emotions, or the action scenes.
For me, Persona 5 takes the cake for the best story in the SMT series. It has a compelling narrative with well-developed characters and a unique theme.
I'm not very familiar with specific 'smt nocturne' light novels. However, you can try checking on popular book - selling websites like Amazon or Barnes & Noble. They usually have a wide range of light novels and might have some related to 'smt nocturne'.