Dr. Kuseno’s next improvements give Genos an almost demon-like appearance that features jagged spikes on his arms and armor that seem reminiscent of Guts' from Berserk. This upgrade allows him ...

G4 eventually sheds its external armor, revealing a more compact true form. At the cost of being half-destroyed, Genos is able to defeat the villain and take his components back to Dr. Kuseno to ...