Romerio was a member of the United States Colonial Marine Corps. He was part of a search and rescue mission sent to LV-426 aboard the USS Sephora in 2179 to investigate the disappearance of the USS Sulaco and its crew 17 weeks earlier. Romerio was killed early in the mission after suffering injuries in the internal explosion of the Sulaco.


Romerio was part of Rhino 2-1, one of the advanced teams sent aboard the USS Sulaco to investigate the ship and reinforce Rhino 2-3. Romerio was one of the several Marines injured in the internal explosion aboard the Sulaco that occurred just as Corporal Winter was attempting to board the ship via the umbilical from the USS Sephora. As Private O'Neal was opening up the hangar door, Romerio succumbed to his injuries. O'Neal tried to resuscitate him to no avail.


Romerio was outfitted with standard-issue M3 Pattern Personal Armor for protection; his armor was fitted with a TNR Shoulder Lamp attachment for illumination. He also had an M10 Pattern Ballistic Helmet, which he had strapped a pack of cigarettes onto the side. He had customized his armor vest with the United States of America flag on the chest plate and the words "Bringing the hurt since 1776" below it, he also had a devil pinup on his left shoulder pauldron. His armor also had several shotgun shells strapped to the vest. Romerio carried several pouches and grenades on his waist around the belt. He also had a Combat Knife stored on the right side of his right leg armor. Romerio also carried an M4A3 Service Pistol.


  • Romerio's TNR Shoulder Lamp glitches through the floor.
  • After Keyes and Winter return to the hangar bay with the Sulaco's flight recorder Tolentino's body is gone.