Rocky is a member of the Voltron Vehicle Force. He is part of the Air-Sub Team, and his vehicle forms the upper torso of that Voltron. He is known to eat a lot and is nice. He is friends with Hunk from the Voltron Lion Force. He and Hunk have many similarities. He operates the Strato Weapons Module (#2).
He is based on the character Shinobi Kai from the Japanese cartoon Armored Fleet Dairugger XV.