Name: Issei Kurosaki
Designation: Kamen Rider Caucasus
Gear: Caucasus Kabutech Zecter, Rider Brace, Hyper Zecter
He is ZECT's strongest soldier. Usually seen with a single blue rose. He is able to defeat Kabuto and Gatack with his Hyper Clock Up but is stopped by Gatack from killing Kabuto with his Rider Kick. He is later killed by Hyper Kabuto by being sent into the missile heading for the second meteor. His power easily exceeds the power of all the other Riders. It appears that Caucasus cannot access the Hyper Zecter's full potential, however, as evidenced by his lack of a proper Hyper Form and the weaker power of his Hyper Clock Up.