De Santa is a captain in the Mexican Army, serving under Colonel Agustin Allende. He was born sometime in 1877.
Ambitious and unprincipled, De Santa knows that he is fighting a war, and he has to win as the rebels have placed a price on his head. He will do anything for the Army and kill anyone that tries to stop him. De Santa is portrayed as a cruel, abusive, and sadistic man. Regular he personally participates in the slaughter of civilians that support the rebels and willingly kidnaps women to satisfy the sexual appetite of his commander, Colonel Allende.