Sig is a mutant who is from The Steadfast. He joined the Aeon priests, honing his unique ability to detect and speak to Numenera before he was driven out because of his more obvious mutation, a four foot long tail. Travelled east from his home until he reached the cold desert oasis city of Serenity. He was working fixing the lift lowing and raising people from The Below. There was a malfunction of the lift which led it to collapse and that was blamed on Sig which is why they threw Sig into jail.