Kamen Rider MetsubouJinrai (仮面ライダー滅亡迅雷, Kamen Raidā MetsubōJinrai) is a central character of Zero-One Others. It is the fusion of the four members of MetsubouJinrai.net (Horobi, Naki, Jin, and Ikazuchi) as a result of their corruption by the Massbrain System (マスブレインシステム, Masuburein Shisutemu).