The KAOS agents behind the plot. "Sophie" is at right.
Ostensibly an invisible maid who serves drinks to Max and KAOS Agent Ehrlich after Max is captured and taken to Ehrlich's headquarters.
In fact, Sophie's movements are controlled by a KAOS agent in another room through a system of wires and pulleys as part of an elaborate extortion attempt.
This agent, whose name may or may not be Sophie, is portrayed by Donna Walsh [Episode #5: "Now You See Him, Now You Don't"].