Corporal Dominic "Dom" Santiago ES was a Gear soldier in the Coalition of Ordered Governments army.Dom was the younger brother of Carlos Santiago and son of Eduardo Santiago and Eva Santiago.
Five years later, Dom had begun dating Maria, but accidently got her pregnant.
Dom was born to Eduardo and Eva Santiago in Tyrus during the 60th year of the Pendulum Wars, and lived in the city of Ephyra with them and his elder brother Carlos, and attended Olafson Intermediate School.
When Dom was eight years old, Carlos met and became friends with Marcus Fenix, and Dom became friends with him as well.
Born in a Pre E-Day Sera, he grew up listening to his father's war stories and going to school with Carlos and best friend Marcus Fenix.
Dom later joined the army as a commando and took part in Operation Leveler.