Far From Home
Humanoids with ashen skin. Shorter than the average human. Notable in that no individual Grey Man has a distinguishing physical feature – even the features that differentiate the genders cannot be determined by us. They create individuality through clothing, piercings, and tattoos. They do not appear to be primitive, having access to advanced simple machines (trebuchets, catapults, etc) and written word in books and libraries.
Currently, Rodney is the only person to be able to communicate with them.