Those calling Vikia a "bitch" are met with a nodding approval from the woman herself; she is cold and calculating and a deft sniper, wildly aloof and condescending to all others. Call her worse than a "bitch" and you'll find out just how deft a sniper she actually is.
"Vikia" was a robot in the Social Robots Project at Carnegie-Mellon University, named from the acronym "Very Intense Know It All," because her artificial personality was given confidence and assertiveness to try to obscure the robot's lack of actual understanding in conversation. This reinforces the fact as to why she has a fission battery, sensor module and scrap metal in her inventory.
Her quote (in German) "if it isn't Old Surehand" is a reference to the Karl May filmFlaming Frontiers. The reason behind it being German is because Karl May was in fact German.