"Blue Guy" as commonly referred to by fans, is a recurring character in the Interface series. Not much is known about the character other than he seems to be an important figure in the overlying plot of the Interface series.
"Blue Guy" appears to be a smartly dressed Middle-Age Man. Although human in appearance, it is uncertain his particular being. "Blue Guy" wears an outfit similar to the man depicted in René Margritte's painting; The Son of Man, of which an episode of Interface shares the same name.
"Blue Guy" is seen in the first episode browsing a window display in a city believed to be Modern-Day Montreal, Canada and is approached by "Mischief". It is unclear what has drawn "Blue Guy" and "Mischief" together leading to speculation that he may be special in some way. He is a passive character and goes along with what "Mischief" wants him to do, he has yet spoken or shown much emotion which has shrouded him in mystery