It's a Regulator! A sorta secret police for the city of Ves'Nola. :] There's buncha dudes who look like this with similar augmentations that are used by the military or Social elite for whatever purpose. They take oaths of silence and have surgery to have the masks attached to their faces, and their knuckles replaced with enchanted metal that releases shock and 'force' explosions on each punch.

worst outcome of 'first to pass out at the party'

Definitely a prank several steps past 'too far' xD