Big Cheese

Big Cheese is a Tourist working for the Railroad

Background
High Rise was nervous about Big Cheese and wanted to take extra precautions when dealing with them. He described their behavior as "abnormal," and planned to file a separate report about them.

Appearances
Big Cheese is mentioned only in Fallout 4.

Behind the scenes
"The big cheese" is a term used to describe someone that is of high importance within a field.