"Robo-Ky is a robot created by Crow of the Postwar Administration Bureau, and was made to look like Ky Kiske to fool people. His job is to gather data on people and kill possible 'nuisances.' Robo-Ky started off as simply a palette swap of Ky with faster moves, but in later sequels, Robo Ky developed into his own personality and moveset."

"During the time of GGXX: Accent Core Plus, Crow sends Robo-Ky to different missions, trying to send him to his destruction. In the Story Mode for the other characters, Robo-Ky appears as a guardian for the Bureau or as a crazy robot that finds everybody to be "defective" minus the female characters. Instead, he tries to turn them into his wives."

                                                                                                - fightersgeneration.com