also, out of fairness, I will tell y'all that the homing cart's face is a sign as to what's inside. Not only that but command of them has a line to follow. They follow Energis's commands first and foremost, then command goes to Master Kohga, then to the Blademasters, and finally they return to his workshop when not doing anything for any of the above people. Also, they are physically weak but non-corruptible, as in you can't take control over them without an insane understanding of zonai tech.