Kamen Rider Dex also known by his real name Takeshi Dexter is a Police Officer and Kyoto police Affiliated Detective he himself got Rider tech from Dai Shocker base he raided(needed to use all of his ak 47 ammo on Shocker footsoldiers and then throw ak 47 at forehead of a Shocker lieutant with full force) Dex beliefs in following procedures and rules he himself assists Kamen Rider Shikaru wanted to eliminate consequences to the locust themed vigilante in exchange for help to crack Dai Shocker.