Cybernetic Technical Robot Operative, or C.Y.T.R.O. for short, is a supporting protagonist in the Max Steel franchise. Depending on the continuity, C.Y.T.R.O. is either a robot created by Dr. Gregor Rendel to destroy Max Steel, or he's built by Berto Martinez of N-Tek to help protect the base (and ultimately to protect Berto's sister Rayne should anything happen to him). One of Max Steel's most trusted allies, he would eventually transition from a mindless drone to a key member of Max's Team Turbo, along with Rayne Martinez and Alex Villar. Armed to the teeth with weapons, C.Y.T.R.O. is a physically massive and powerful, yet logic and observation-driven robot.