- This article is about the character from Layton Brothers: Mystery Room. For the character from Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy with the same name, see White Cat; for the character duo from Professor Layton and the Curious Village see Cat and Mouse.
Cat was the alias given to the wife of Pig in a recreation of his murder. She discovered his body, and was one of the four suspects of File No. 008: Ham and Cheese.