In the 'John Smith and the Red Jacket Novel', John Smith is presumably the central figure. He might be an ordinary person at the start, but the red jacket could change his life in many ways. Maybe he's a young man trying to find his place in the world, and the red jacket becomes a catalyst for his growth and development. It could also be that he has a special past or destiny related to the red jacket that will be revealed as the story unfolds.
The main character is Cid Kagenou. He is the one with the delusion of being an eminence in the shadow. His actions, while often based on his wild fantasies, drive the story forward.
I'm not sure which specific 'John Smith' in the 'true story' you're referring to. There could be many people named John Smith. It could be a common man with an interesting life story, or perhaps it's a particular John Smith known in a specific community, event, or historical context.
Another key character is an older, more experienced figure who serves as a mentor or a source of information at times. He has a deep understanding of the world's secrets and helps the main character navigate the various challenges. These characters, among others, combine to create a rich tapestry of personalities in the 'Eminence Shadow Light Novel'.
The protagonist is Cid Kagenou. He's the one who desires to be an eminence in the shadow. There's also Alpha, who is an important figure among his comrades.