One of the SPARTAN-II commanders that appear in "The Homecoming". Ralph-303 and a group of other spartans rebelled against their trainers before the augmentation process into giving them freedom and return home.

Ralph was abducted and conscripted into the SPARTAN-II program by Dr. Catherine Halsey in2517 when he was just six years old. He was then taken to the planet Reach, and trained by the AI Déjà and Chief Petty Officer Mendez, along with the rest of the Spartan children.