Kouji Tomori is the human identity associated with Metalder in Choujinki Metalder. He is a calm, compassionate, and determined protagonist who fights against the cruel Neroz Army to protect humanity. As Metalder, he serves as a super-android warrior built for battle, but his character is defined by his struggle to understand human emotions and choose justice over destruction. He plays the central role in the series, leading the resistance against the villains.