The Pallid Mask is a character created by Paizo Inc in 2017 for the Pathfinder roleplaying game.
Background
The Pallid Mask (aka, Phantom of Truth, The Stranger) is a humanoid emissary of Hastur. Whom is a 6ft tall slender figure in a voluminous yellow robe who walks around with a staff and has a genderless, featureless white mask covering his face. For millennia it has visited cities known for their nihilism and decadence to determine if they should be consumed by Carcosa.