Rock Anlock is the J9-III team's primary marksman and weapons specialist, recruited by I.C. Blues for his exceptional sharpshooting skills essential to operating the Sasuraiger robot's weaponry during solar system combat missions. He cultivates a reputation for icy composure under pressure, deliberately avoiding emotional displays to uphold his detached professional image.

A traumatic past drives Rock: the Bloody God syndicate murdered his close friends and left his father permanently wheelchair-bound. This fuels his relentless pursuit of vengeance against those responsible, directly shaping his motivations and honing his marksmanship as a response to the violence against his loved ones.

Within the team, Rock functions as Blues' trusted second-in-command, making decisive crisis interventions. He occasionally displays recklessness against syndicate operatives tied to his past but maintains strict discipline during Sasuraiger's transformations and combat sequences. His technical duties involve coordinating weapon deployments with the team's technician, Jimmy, during battles.

A pivotal development occurs when Rock eliminates the specific syndicate members responsible for his father's condition and his friends' deaths. This personal vendetta briefly overshadows the team's mission during a focused narrative arc. Afterward, he shifts toward a more protective role toward teammates, particularly in later conflicts against Bloody God forces, solidifying his commitment to completing the solar system journey.

During planetary stopovers, Rock interacts sparingly with civilians while retaining his reserved demeanor, yet demonstrates underlying loyalty by defending innocent bystanders from syndicate aggression. His operational partnership with Beat occurs during Sasuraiger's navigation, but his most consistent collaborations involve Blues for strategic planning and Jimmy for weapons operations.