Lobos was the quaternary antagonist in season 1 and one of the main antagonists in season 2-3.
Lobos is a massive drug distributor and he is on the FBI radar.
Lobos is first seen talking with Tommy Egan and Ghost about business when the product is robbed, it is also revealed that he is not satisfied with Ghost's services. He meets with the Soldado Nation leader Carlos "Vibora" Ruiz and the latter offered his services, which Lobos refused s it wasn't enough for him. He has rival dealers with the Jimenez cartel, one of the Jimenez cartel hit men go to Lobos and assassinate him but fails and tries to kill his boyfriend/partner and Lobos counters and shoots him. When Ghost wants out of the drug game, Lobos doesn't like it, but eventually Ghost calls Lobos and tells him that he will carry on working for him and be the biggest drug dealer in New York.
When Kanan is released from prison he tries to get in contact with Lobos and wants Ghost dead. Lobos is later arrested and sent to prison along with Tommy and Lobos' bodyguard is shot by the FBI. Ghost later comes to assassinate some of the drug gang leaders Vladimir and Drifty and pays off Carlos "Vibora" Ruiz to disappear. Also Ghost sends a contact to stab Lobos in his cell. However, Lobos survives and it is revealed that he has Mike Sandoval, working as a mole in the FBI. When Tommy is released, Sandoval gives Lobos his mobile phone and sends his contact to Tommy and tells the latter that he knows he wasn't involved in the assassination attempt on him. He then asks him to kill Ghost in return of Tommy being the main distributor of New York otherwise he will kill Tommy, Holly, and Holly's dog.
While Lobos wants Ghost dead, Tommy makes a hard decision to kill Ghost, failing that he will kill Ghost, Lobos sends one of his henchmen to Tommy's house and kills his girlfriend's dog. Tommy and Ghost later team up to hunt down Lobos. Tommy arranges to break Lobos out with Lobos' men, Ghost kills one of Lobos' guys and takes Lobos to the woods to get buried. Lobos runs away when an FBI agent who has arranged Lobos' escape rings up Lobos but his phone breaks when Tommy smashes it which Lobos runs off. In the woods while Ghost and Tommy look for him, Lobos garrotes Ghost, but Ghost counters and shoots Lobos to death in the chest two times.