The pair name for Carlos and Cecil from the podcast Welcome to Night Vale. Carlos is Night Vale's most valued scientist. Cecil is the radio host of Welcome to Night Vale. They are a canon couple (and not to mention, completely adorable).
Person 1: Have you listened to the most recent Night Vale?
Person 2: Yeah! I totally ship Cecilos! Aren't they cute?
Person 2: Yeah! I totally ship Cecilos! Aren't they cute?
by A Frequent Night Vale Listener December 21, 2013