Emiliana Perfetti is a reoccurring character appearing in Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy. She works at Scotland Yard as a criminal analyst, specializing in profiling. For reasons that are currently vague, she sees Katrielle as an arch-rival.
Perfetti has very dark brown, mid shoulder length hair which appears to be somewhat frizzy. She is always seen wearing circular glasses, a grey-blue dress and suit jacket, orange ribbon and dark boots. Emiliana carries a thick, dark green book at all times, which she is seen to consult during the puzzle solving animation.
Since she is an adept criminal profiler (described by others as a "genius"), Emiliana is very logical, only relying on cold hard facts. It is for this reason that she dislikes Kat's 'gut'-reliant methods. Somewhat surprisingly, she is be terrified of the supernatural. She claims that she likes watching movies to unwind between her work, however this seems to be something of an understatement as she entered the competition to win tickets to "No Sub for Love" hundreds of times although she denied this. She is also hinted that she is a fan of romance (and the actor Leonardo DiCameo), which she also denied.
She is described by her co-workers as a "severe" person, and they are surprised when she shows her more considerate, soft side.
- It is heavy hinted that Emiliana is at last part Italian. Her name has Italian origins, and she states she has Italian blood at one point. She also often uses Italian phrases when she is speaking, such as "va bene", which translates to "all right" or "okay."
- However, she has also used the word "non" to mean "no", which is French, not Italian.
- "Emiliana" has the meaning of "rival", whereas "Perfetti" is a reference to her "perfect profiling".