Vishby is an Atlantian elf that first appears in The Opal Deception. He and another Atlantis marshal (K-Max, an obnoxios jumbo pixie ) were transporting Mulch Diggums to a hearing in a sub-shuttle. He is described as a "slight elf with Atlantean gills", capable of inhaling through his neck and exhaling through his mouth. It appears that when he cannot suck in air fast enough, he begins wheezing.