You can read about it in one of the other posts. The most inconspicuous character, however, is James. The one you play as. In the game's programming, James is present. He is hard coded into the game's AI as us. So is his age and occupation, this is why I went into the code to find out if my memory was correct on his name and age when informing players who they were playing as.
If anything, you may wonder about James' backstory. We are thinking about writing a backstory for both Alexa and James. These will go more in-depth on the lore of the world. These will also be based on my play tests as the play tests offer a lot of lore, despite most of my play tests dealing with what is basically an AI visual novel that generates it's next lines.
I found what it generated interesting, so it'll lead to inner storylines in the lore books.
Players can still do what they want with James, they can go for the canon more or create their own lore for him and their own backstory.