Throughout the series, there is a little information about them. In episode 2, the idea of imprisonment has been used on traitors; they have free will, but some might prove as psychotic. In episode 9, the idea of personal relationships is known: Minister Argos claims that the warrior beast Cleo is his daughter. Although most of them have murderous personalities, few do not such as the battle beast Bruton in episode 10 and Kelvinius in episode 16. In episode 16, Kelvinius has flashbacks indicating that the original Mycenae Empire was once a peaceful nation with him as the prince. However, the Emperor of Darkness came into the picture and ordered human sized Talos units to take over the entire nation and convert everyone into battle beasts. In episode 52, the process of "fusion" between the human and the robot is hinted: Shinichiro Okida was merged by Marquis Janus with a robot to create the Battle Beast Jerunicas.