Sure, it can be normal. Just like any person might be interested in what others write about them or their alter - ego. It's a way to connect with the fan community on a different level.
Well, it could be a way for the daredevil to see how others perceive their character. Maybe they find it interesting to see the different scenarios and relationships that fans come up with in the fanfiction.
One common theme is loyalty. In many fanfics, Okita and Nobu show unwavering loyalty to each other, whether it's in the face of danger or in difficult personal situations. For example, they might stand by each other when facing an enemy or when dealing with family issues.
I haven't heard about the 'nobu stable boy short story' before. It might be a very specific story from a certain region, community or a self - made fictional piece. If you can give more context like the genre or some key events in the story, it would be easier to answer.
The unique feature of 'nobu san light novel' could be its character of Nobu. He is often portrayed as a very relatable character with both strengths and weaknesses.