So far there will be no one but your characters. Feel free to start. You have multiple options for where your characters can wake up. I recommend three to a chain because it can add more conflict, but two is fine. I know some characters are going to be away from everyone else. I have plenty of dead characters I can add if you're all alone. Pretty soon, there should be a centaur, a guy with corrosive blood and healing tears, and a selkie.