They were first shown at the Battle of The Second Wall of Peaceful Coexistence. These robots were used as reinforcements and workforce for the Felines in the 5th Army Corp of Zahard's Army, specifically for the "2nd Division".
They have worked for the Felines for quite a long time, as seen during the past story of Lo Po Bia Haratcha when he was still a young normal Ranker. The Robot Army were used to invade the Rashangs village.
Each Robot are able to fly and fight Rankers. They are quite strong and durable because of their armor. Most robots were built with humanoid body model, it has legs and arms. However, there are several robots that are in completely different shape, like a Floating Ship.