Tetsuya Azuma, also known as Casshan, is the protagonist of the anime series Shinzou Ningen Casshern. He is a young man who sacrifices his human body to become a powerful cyborg in order to fight against the android rebellion led by Braiking Boss. Created by his father, Dr. Azuma, Casshan embodies the hope of humanity against the mechanical threat. With his enhanced abilities and unwavering determination, Casshan strives to restore peace to the world and protect it from the tyranny of the robots, while grappling with his own identity and humanity.