Well just in case you're confused like Pudding is I'll inform you to: We're all on the plane at the start of this or at least we're supposed to be. It's a way to interact with each other and put us all in a spot where we can smoothly go through this prologue without getting side tracked or hampered by how a person got here and why and etc. They didn't all come on at the same time unless you want it to be that way and were in the same general area at the other person.