Ryoko Mizuki

Ryoko Mizuki (水城 涼子): Keisuke's fiancee, Keitaro's assistant, and a G.O.D. member. She is an Interpol investigator and executes undercover operation in the G.O.D. She became a cyborg by G.O.D.'s operation. Her true identity was exposed protecting a child from Strong Arms Atlas and she was destroyed by the General of G.O.D.

Arsenal

 * Rifle: Ryoko was once seen wielding an unidentified make of rifle.

Portrayal
Ryoko Mizuki was portrayed by Naoko Miyama (美山 尚子), who also portrayed her identical twin sister Kiriko Mizuki.

Appearances

 * Icon-x.png Kamen Rider X
 * Episode 1: X-X-X-Rider is Born!!
 * Episode 2: Run, Cruiser! X-Rider!!
 * Episode 3: Assassination Dark Spider Operation!!
 * Episode 4: G.O.D., the Shadow of Fear!!
 * Episode 5: The One-Eyed Monster's Human Review Operation!
 * Episode 6: The Japanese Islands Fragmentation Plan!
 * Episode 7: The Terrible Genius Human Project!
 * Episode 8: Mystery!? Little Earth - Middle Earth - Big Earth