The Karap Valley, situated on Hewl, was known for being a low-lying area. A common feature of this location was the presence of regular and dense fog.
Within the fog banks of this valley, the Filar-Nitzan spy named Vacander – a being composed of gas – was able to conceal himself. During one such instance of hiding, he observed Rebel Colonel P. Essex Yerac in pursuit of a party of bounty hunters. Vacander then revealed his red eyes to Yerac, seemingly emerging directly from the fog, and instructed him to maintain a safe distance.