Though the tradition has fallen out of favor in recent years, All Saints' Wake was quite the event back in the days before the calamity.
Perhaps you've heard of the commotion that was caused when a band of most ingenious imps escaped from their gaol, refusing to return unless adventurers solved the riddles they posed.
I was there, and I can assure you that it was a most invigorating—er, exasperating—yes, a most exasperating occurence!
An Imp masquerading as a Hyur with a Pumpkin for a head, the Impresario is the haughty 'mastermind' behind The Continental Circus, an organization of Voidsent that try to cause mayhem every All Saints' Wake, but always fails due to the Warrior of Light.
This NPC is found in multiple locations. The map below shows where the NPC is first encountered.