No band has used masks quite like Sleep Token, though. Looking further back to the relationship between face decoration and themes of anonymity and identity, comedy and tragedy, theatre and ritual ...
The three genres of drama were comedy, satyr plays ... tragedies and made fun of the plight of the tragedy's characters. The satyrs were mythical half-human, half-goat figures and actors in ...
The Mockery of Madness: Laughter at and with Insanity in Attic Tragedy and Old Comedy This is the metadata section ... and physical depiction of madness—in particular the use of mask—in both genres.