Agent Six

Agent Six is one of the characters from Generator Rex Universe. His name comes from the fact that he is the sixth most dangerous man on the planet.[1] Due to Six's strict by-the-book personality, Rex goes as far as to refer to him as a "nanny, just more aggro."[2]

After a six month gap and Rex's disappearance, he was operating against the reformed Providence and Black Knight, whilst trying to regain six years worth of memory loss.