Alejandro

Alejandro Vargas is the leader of Los Vaqueros, an elite Mexican special forces unit and a member of the elite counter-terrorism unit OTH-141. He has brown eyes, black hair, slight stubble, is Mexican, 183 centimetres tall, and has an athletic build. He is a colonel. 40 years old.

Alejandro grew up in Las Almas with his deputy in command, Sergeant Major Rodolfo Parra. He often skipped school to spend time on the mountain trails on the outskirts of the city that would later become a cartel hideout.

When he turned 18, he joined the Mexican Special Forces, where he served with Valeria Garza. Much later in his Special Forces career, he would conduct a raid on La Aranha's son, but would be betrayed by Valeria and her unit, who were on the cartel's payroll. Alejandro eventually rose to the rank of colonel and became commander of Los Vaqueros, a special forces unit made up entirely of non-corrupt soldiers raised in Las Almas.

At an unknown point, presumably after Valeria's betrayal, he made contact with Kate Laswell and began co-operating with her, even advancing so far as to call her by her first name, indicating a level of mutual trust between the two.

Los Vaqueros and OTG-141. Kate Laswell sends Rudy and Alejandro to keep Ghassan Ziyani from being sneaked across the Mexican border by members of the Las Almas cartel. They are late and pursue Ghassan despite the fact that they have no authority. After chasing Gassan and his cartel escorts through a residential neighbourhood, the local authorities corner them near a cartel safe house and ambush the cartel members. Rudy and Alejandro survive the ambush and Rudy advances to clear the safe house. After neutralising several cartel operatives, Rudy is again ambushed by Gassan's escorts and left for dead after Gassan taunts him and sets the house on fire. Luckily, Alejandro saves him when Gassan escapes.

In the Cartel Fighters mission, Alejandro commands one of a squad of Vaqueros who are raiding a cartel hideout. This squad includes Johnny «Soap» McTavish and Simon «Ghost» Riley. After fighting their way through the cartel operatives to the last building, they discover that they have missed Ghassan. They are then attacked by corrupt elements of the Mexican army and forced to flee the hideout. Separated from the rest of the Vaqueros, Alejandro leads the team into the mountains on the trails he played on as a child when he was pursued by the army, while Rodriguez tries unsuccessfully to call for help over the radio. After losing Rodriguez to a sniper's gunfire, Alejandro tells Ghost and Soap to jump off the cliff into the river below. Together they swim, making their way to an evacuation site on a nearby bridge. After being rescued on the bridge by Phillip Graves and his AC-130, Alejandro takes the team to a nearby cartel base where Gassan has been spotted.

During the Air Support mission, Alejandro helps Ghost and Soap sweep several buildings in cartel territory while under cover from above the Shadow Company. This culminates with the trio taking Ghassan into custody when Rudy arrives in an getaway car to pick them up. When they are ambushed, Alejandro takes refuge with the rest of the team on a rooftop in the town of Olmeida as they are attacked by cartel fighters and corrupt Mexican army soldiers trying to get Gassan back. Graves and his attack helicopter again provide them with air cover. He later attends Gassan's interrogation in the Mexican desert.

In Dark Water, Alejandro, Graves, Graves, Soap, Ghost and Shadows conduct an attack on an abandoned oil platform in the Gulf of Mexico used by the cartel as a transfer point. During the attack, the missile goes into a pre-launch phase. Alejandro remains on the platform while Ghost, Ghost and Soap and Graves attack a nearby cargo ship where the missile controls are located. When Graves and Soap are forced to target the oil platform to prevent the missile from hitting New Orleans, Alejandro and the remaining Shadows quickly evacuate the platform before the collision. Upon returning to the base, Alejandro discovers that it has been taken over by the Shadow Company on Shepard's orders, and the Vaqueros on the base have been detained.

During the jailbreak, Alejandro and the rest of the Vaqueros are freed by Rudy, Ghost and Soap. They fight their way past the remaining Shadows, and are helped at the end by the newly arrived John Price and Kyle «Gus» Garrick.

After being freed and returned to their secret hideout, Alejandro is rallied by the Vaqueros, and they form the Ghost team along with members of OTG-141. They infiltrate the Special Forces base through underground tunnels with a dual purpose: to capture Valeria, who is still in custody in the base hangar, and to kill Graves for his betrayal. The team successfully accomplishes both objectives.

Alejandro and Rudy are later shown taking Valeria into custody as they bid farewell to Soap, Ghost and Soap and Price on the base runway.