Gai Amatsu

He is Yua Yaiba's superior, Creator of Ark and the benefactor of A.I.M.S. Secretly, he is the one who instigated the Daybreak Town Incident, by making the Ark satellite to deem humanity as a threat to the world by feeding it knowledge about humanity's atrocities as a plot to destroy HumaGears and his own species, leading to the creation of MetsubouJinrai.NET. His goal is to acquire Hiden Intelligence by inciting panic over HumaGears to lower Hiden's stock, he also the one who implanted false memories to Isamu Fuwa, via the A.I. clip in his brain and treat him as "stray dog". By inserting both a Progrise and ZetsumeRise Key into the Zaia ThousanDriver, Gai transforms into Kamen Rider Thouser.