Ah, I'm taking a closer look at Category:Appearances (and the other Categories similiar to it). Since they're all subpages of Character pages...my new opinion on this is that the categories Appearances,Quotes, and Relationships should go under Category:Characters.
This'll make the ambiguity in Content a little more clear. I'm of the opinion Content is meant for things you find in the "World" of the Wandering Inn, going by all the Locations, Plants, Metals and other world building categories in there.