V78 was a Voc that worked at one of the Kaldor City Company Laboratories.
When the laboratory was sealed to prevent the humans and a dangerous consignment of nanobots from escaping, V78 was instructed, by SV66, to restrain V97 when it believed the Super-Voc had gone against it’s prime directive. Together with V52 they took V97 to the basement and locked it in there with several deactivated robots. (AUDIO: Do No Harm)
Having survived the later explosion a the laboratory V78 was moved to the Kaldor City Hospital emergency calls department. When it was about to go off shift it started receiving multiple calls; all from humans with very serious anxiety and pain, and all from Sector 13. (AUDIO: The Mystery of Sector 13)