Knock serves as the assistant to Harabote Muscle, the chairman of the Universal Chojin Committee, and is a Seigi Choujin from Planet Harabote, the same ethnicity as Harabote Muscle and Kinnikuman. In the Perfect Origin Arc, he is a constant ringside presence, responsible for ringing the gong to signal the start and end of matches and for offering advice on the rulebook. His role is to help the Committee oversee the proper execution of bouts, ensuring that the often chaotic clashes between the Justice, Devil, and Perfect Choujin remain organized. Knock’s personality is efficient and practical, focused on his duties without seeking personal glory or combat. He works closely with Harabote Muscle and interacts with the larger cast of Choujin only in his official capacity. He does not possess notable combat abilities or undergo significant personal development; instead, he remains a steady, supporting figure who helps maintain order during the high‑stakes tournament and political upheaval.