While Robin was interrogating Cyborg in order to isolate his best personality from the rest, he shoots Cyborg with a Mysterious Prism loaded gun resulting in five different Cyborgs and Grey Cyborg was amongst them. When Robin appointed Green Cyborg to the new Titans team, Grey Cyborg nervously explains that he was never given a chance to prove himself. However, Robin wasn't interested in the excuse and takes him out.
Grey Cyborg looks exactly like regular Cyborg except the transparent modules on his head and arms are gray, and the cybernatic eye is blue.
Grey Cyborg is very scared and nervous. He lacks confidence in himself and talks in a shivering manner. He always cringes in fear and everything has to be scary to him. This makes it hard for him to be a soldier.
- Some of Their Parts (debut)
"But I haven't even-"