Dex Tsukada

Dex Tsukada (デックス塚田) is a member of the Tokyo Department of Science, an organization that constantly works on experiments and new technology. When an experiment goes wrong, Dex became Kamen Rider DNA仮面ライダー DNA (ディーエヌエー) (Kamen Raidā Dīenuē) to completely to destroy this "failed experiment".

Personality
He has a calm and collected guy, a DFM (Department's Favorite Member) at Tokyo Department of Science. He cracks a lot of jokes during battle, much to the surprise of his allies.

Devices

 * DNA Driver - Transformation device
 * Rider Syringes - Transformation trinkets

Weapons

 * Subject Syringer

Vehicles

 * Machine Deoxbike - Zero-One's personal