Colonel Alejandro Vargas is one of the higher ranking officers within the Mexican special forces and has been for a good while. While usually appearing fun and peppy, he's often peeved off, he takes his job very seriously, and will stop at nothing until his squad (The Vaqueros) stop the on going rise of drug cartels, playing a large roll in locating and stopping them. He's the only soldier in the special forces with the permission to work outside of mexico and to bring help from foreign units.