One of those players is the ghost. Everyone else is the family. Each member of the family should decide who they are and discuss their relationships out loud. The only constraints for the family are that they must live together under the same roof and all have a long history with each other they do not have to be related by blood/married necessarily. The ghost may begin to develop general ideas about their character, but should not yet settle on who their character is or what happened to them. Their ideas should develop as winter progresses.