Androids refer to humanoid robots or artificial humans. There were many references to them in science fiction novels during the times of Lost Jerusalem.
KOS-MOS, developed by Vector Industries, is an anti-Gnosis weapon in the form of a female and exemplifies an android. There are some who believe that an android like KOS-MOS is anachronistic in a time when Realians are the norm. Although the technology to develop KOS-MOS is ancient, her specs far surpass those of Realians and both could be considered androids since they are both artificial.
Doctus is portrayed as a remote control-type android, controlled wireless by the real Doctus by projecting her consciousness into its artificial brain to manipulate the body, allowing Doctus to conduct missions in safety without physically being harmed.