Zeta Kai unbox the Plaiobot Gurren Lagann Gurren Lagann (グレンラガン, Guren Ragan?) is the primary Gunmen of Tengen Toppa Gurren Lagann. The head, Lagann, has always been piloted by Simon, while the body, Gurren, was originally piloted by Kamina, who was then succeeded by Rossiu, and eventually Viral in the second story arc.
