Shotaro Hidari and Phillip/Kamen Rider Double

Kamen Rider Double (仮面ライダーダブル Kamen Raidā Daburu) is the main and eponymous protagonist of the Kamen Rider Series Kamen Rider W. Double is the first Kamen Rider that transforms from two people. Double made his debut appearance in the film Kamen Rider Decade: All Riders vs. Dai-Shocker.