Also known as: 鏡像の城戸真司, 鏡の真司, リュウガ
The primary antagonist in Kamen Rider Ryuki: EPISODE FINAL. He is the Mirror World duplicate of Shinji Kido who transforms into Kamen Rider Ryuga (仮面ライダーリュウガ, Kamen Raidā Ryūga, Masked Rider Ryuga), the final Rider to appear in the Rider Fight.