Not sure if this is a thing, but an app with all the characters and a synopsis would be nice. I always loved the little books that came with old fashioned games. They could give a small info line, DOB, a like and dislike, relations with other villagers, where they live, etc. Obviously not all of those. It would work like a contact page in a phone.

I think there will be something like this, as when you meet someone new it usually says "NPC Name has been added to your contacts!" but currently we don't have a contacts app, a staple in any phone. I'm hoping that it'll be like modern contact pages where you can add all sorts of information about the person including notes. : )