Shadow Knight first appears as a man dressed in a white suit wearing a black top hat, sunglasses and a white mask over his nose and mouth. In later episodes he disguises himself as a man dressed in black and wearing a mustache. (Played by Kikuchi, Toshiaki the primary Kikaida costume actor in both Jinzo Ningen Kikaida and Kikaida 01).
Shadow Knight was the First Executive of the Shadow, second in command after Big Shadow (until Gill Hakaida usurped his position). Through his one large eye he could damage the vision of others and from his sword he could fire a Deadly Executive Impulse Missile. As one of the Shadow leaders Shadow Knight did not have a number printed on his back.
Shadow Knight sometimes rode in the back of a topless red car, driven by a Shadow Man.