Black Express operates within the Blatcher gang, executing Operation Darkness against the Hikarians. This antagonist stands apart as the sole character in the conflict not based on a real-life bullet train. Black Express specializes in strategic deception, setting traps designed to exploit Hikarian vulnerabilities. For instance, in episode 143, the character orchestrates a trap by manipulating Dr. 300X's concern for Windash, a plan that fails due to logistical oversights.