A Roomful of Names

"I wish I knew who was in my room," Jon said and suddenly he knew every single person that had been in his bedroom ever since it had been his bedroom, except for the one person that was leaving (because technically he/she was still presently in the room). One person's name jumped out from the rest: Sarah McMillan. *Sarah was in my room a year ago?* Jon thought to himself, in shock. *What was she doing in here?*