Rocky was a dog whom lived with Yamaoka and a wanted criminal. Rocky sensed Yoshikage Kira's presence and attacked him, which left his master worried that somebody was inside the house. Kira tried to pick up a knife while avoiding Rocky, but ended up stumbling on the dog's master, and temporarily lost his limbs. Rocky jumped at Kira, but he crossed a wall at the last moment, making the dog hit the wall head-on. Rocky is last seen with his master, worried that the criminal was injured by somebody.