As one of the novelists around here I can confirm you can easily build character and location folders into Scrivener if you want and use them pretty much as in Storymill. My own preference is to have the left brain stuff of the book somewhere else at the moment so it’s separate from the creative right brain stuff. So character, ideas, locations and a regular project diary now sit on my left hand screen in MacJournal and all of the writing happens in Scrivener in the right. But this may change at some stage I don’t know.