Sho is 17. He is lives with his father. He is in love with Mizuki, Tetsuro (his best friend's) sister. He and Tetsuro were out walking when they saw an explosion, and an object landed near them. Which turned out to be a Guyver Unit. The unit engulfed Sho and turned him into Guyver 1. He is the controller of Guyver unit 1.