Kougami, Ryouken

The mysterious leader of the Knights of Hanoi. Much like the others, Revolver is a ruthless individual that seeks Ai. He bears a great hatred towards him and the Cyberse world, considering them a threat to the real world, a notion he developed from his father's research into AI-human interactions. His resolve to rid the world of Ai leads him to take drastic measures, including endangering the entire VRAINS network and many human lives. However, Revolver claims that his actions for the sake of fulfilling his promise to his father to save humanity.

(Source: Yu-Gi-Oh! Wiki)