No one has ever seen him. But everyone knows him. The people of Shant swear by his name, and live in terror of him.
To break canton law is to defy the Faceless Man. To leave the canton itself is to defy the Faceless Man. To refuse to wear the torc that binds you to him is to defy the Faceless Man.
Gastel Etzwane has done all three.
And to defy the Faceless Man is death.