San-Dae "Pickaxe" Yang is One of the original members of Tae-Soo's gang and one of Ken's henchman. He dislikes Ken and often comes into conflict with him. While his loyalty is sometimes questionable, he is highly competitive and does not back down from a fight. He left his village when he was 16 after he had sex with a farmer's wife. Later on San-dae finds his hometown turned into a US Army Base and realizes that he can never go back to his previous life. His nickname comes from the fact that he uses an actual pickaxe in combat. His past reveals that San-dae used to be a superhero called Diago Knight and was rejected by female supervillains.