Jin (迅 lit. "Quick") was a Humagear and founding member of MetsubouJinrai.net who transformed into Kamen Rider Jin (仮面ライダー迅ジン, Kamen Raidā Jin). He was possessed by the Ark as Kamen Rider Ark-Zero (仮面ライダーアークゼロ, Kamen Raidā Āku Zero) and later the Massbrain Systrem as Kamen Rider MetsubouJinrai (仮面ライダー滅亡迅雷, Kamen Raidā MetsubōJinrai).