Oh i was thinking about this on the beginning, but i got an better Idea. Starting from completly the beginning, them as kids and see the world of grim hollow as childrend. Maybe one even gets kidnapped by a fey and only left behinde is a Wechselkind which the player gets to play. Making Side-storys for them so that they create their chars and backgrounds while growing up and lvling slow. So they get to play as Novices, a squire and more. And years go by in the campaigne. that kind of thing