The chief engineer wore a tall yellow hat with a matching jacket over a white shirt. He wore blue pants and brown shoes.
He has a habit of giving away information he's not supposed to.
About a year prior to Last Specter, just after Clark Triton became mayor, the chief engineer was forced by Jean Descole to build excavation machines in the old factory so Descole could find The Golden Garden. The machines, as they were constantly fighting with Loosha and shrouded with fog, looked like the fabled specter of Misthallery's legend.
Chapter 9: The Specter Becomes ClearEdit
The Chief Engineer gives Professor Layton the puzzle "Engine Parts."