So this has been suggested before…
I just spent a whole day going over each of my chapters with a fine-toothed comb to find every bit of throwaway information on some characters and copying that into a resources document.
And then I noticed I already had inconsistencies and spent another hour finding all places I needed to change.
It really would be nice if I could just select some text and tag it for a character/place/etc., then have a view that shows all those snippets for a tag and allows me to jump there.