Due to the Dead: She volunteers to take Jim Dobbs' ashes after Jack refuses, but struggles to make a decision on what to do next. Sonya rather unceremoniously dumps the container into a dumpster.
Erotic Asphyxiation: Has taken to experimenting with this after Jim Dobbs dies. Her obsession with asphyxiation is especially unnerving, because that's how her sister Lisa died at the hands of Jim Dobbs.
Lack of Empathy: This gets her thrown out of the house of the husband of the murdered judge.
My God, What Have I Done?: Has this reaction when she fires a shot at a Juarez cop who was snooping around the prosecutor's hotel room. While this may not seem so severe as she and Marco were in danger, not only is she not authorized to use a weapon outside her jurisdiction, she was carrying one in a foreign country, and Sonya is very much by-the-rules.
Honor Before Reason: Despite having no obligation or expectation to do so, he returns a suitcase full of money to a ruthless drug lord. And then, just to make it clear that he's not a Corrupt Cop, he turns down a reward from said drug lord.
Jumping Off the Slippery Slope:In the last scene of the first season, he asks Fausto to help him get at David Tate so he can kill him personally. Subverted in that, when the opportunity becomes available, Marco ultimately rejects the easier choice of killing David and instead puts his thumb in Tate's already injured eye, while damning him to suffer longer.
Knight in Sour Armor: Admits that most murders aren't even investigated in Mexico, due to the sheer number of them.
Heroic BSOD: After the incident that led to the arrest of Jack Childress
Pet the Dog: Despite his clear resentment of Sonya receiving favoritism from Hank, he has had some softer moments, like looking after Maria in the desert after she's found and after capturing Jack Childress when he laments the death of Manny Stokes on whiskey and a banjo.
Captain Alejandro Robles
A mostly corrupt captain of the Chihuahua State Police. Marco's boss.
Played By: Juan Carlos Cantu
Dirty Cop: He is not the least bit ashamed of his connections to Fausto Galván.
Faux Affably Evil: Usually puts on a magnanimous appearance for the public and for the Americans but can be downright apathetic to civilians and contemptuous of his American counterparts. He also takes part in "parties."
Sex Tourist: Visits prostitutes in Mexico, one of whom include the young woman whose legs were placed on the Bridge of the Americas.
Agent Joe Mackenzie
A DEA agent who is involved in an elaborate scheme to capture leading figures in the narcotics trade, one of which is Fausto Galván. Appears to have suffered a setback from less-involved cooperation from Mexico's new Attorney General.
Played By: Abraham Benrubi
Expy: Of Hank Schrader from Breaking Bad, a blustery DEA agent with a surprisingly geeky hobby.
Dirty Cop: Agent Buckley and the CIA are in cahoots with the whole money-laundering scheme between Rayburn National Bank and Grupo Clio. He also hires an assassin to take out Raúl Quintana after the latter squawks to the El Paso Times.
Dark Secret: Discovers that her late husband smuggled illegals across the border through a tunnel to his ranch.
Extreme Doormat: Most of her Character Development is geared towards evolving away from this trope, whether for her late husband, for Graciela Rivera, for her stepdaughter Kate, or for Ray, towards a woman who makes her own decisions for her own destiny. Occasionally it resurfaces, as when Ray tries to haul ass to Alaska.
Pragmatic Villainy: Fronts up ransom money for a woman kidnapped by the serial killer, just to get the Feds out of the picture and resume business.
Villains Out Shopping: Usually seen doing this, but not enough to cross into The Drug Lord Who Doesn't Do Anything. He has been seen shopping for new clothes with his girlfriend, paying a visit to another organized crime boss in a nail salon, attending his son's tomb, checking out new boats, and playing pool in a bar. Important conversations do take place though.
A creepy bookkeeper for the cartel.
Played By: Franka Potente
Bait the Dog: At first she appears to express kindness by hiring a Mexican dayworker who seems to suffer from a mental disability, despite several others vying for her attention. But then she barks at him to walk faster. And we still don't know if she killed him or not.
Blue and Orange Morality: Appears to operate on an entirely different plane of existence. Has no qualms of killing a teen and sticking his body in a drum filled with bleach, but takes the opportunity to build a makeshift headstone for a roadkill armadillo.
Combat Sadomasochist: To the extent that she'll jam a pin into her own chest just to get her rocks off.
Rape as Backstory: She grew up in some sort of devout religious community where her father raped her repeatedly as a child. Eventually, the community found out, and rather than punish him, they punished her, casting her out. She was then taken in by Fausto Galvan, who offered her vengeance by arranging for her mother to be murdered and her father to be castrated and then locked up in a hole in the ground. In exchange, she became his loyal bookkeeper.
Would Hurt a Child: Zigzagged. While she had no qualms offing Kyle the overeager teenager, she does spare his younger brother and his friend Dex, because she saw an innocence in him (he didn't want to touch her and he wet his bed.)
One of Fausto Galvan's sicarios. His girlfriend, Eva Guerra, tried to escape from him by engaging the services of Steven Linder.
Played By: Arturo del Puerto
Ax-Crazy: Kills a woman in her apartment after she complained about his banging on her neighbor's door and threatened to call the police. Most likely also killed the homeless paint huffer as well in his search for Eva.
Determinator: Almost nothing will stop him from finding his girlfriend Eva. Who knew a hot flatiron would?
Good Parent: Treats her stepson Gus like her own, even after she kicks Marco out of the house for cheating.
Put on a Bus: After the whole David Tate affair, she takes her daughters and obtains a divorce from Marco. She doesn't even show up to sign the divorce papers, instead handing that responsibility over to her lawyer.
The man who raped and murdered Sonya's sister, Lisa.
Played By: Brad William Henke
Chekhov's Gun: Those drawings that he made for Sonya? Including the ones on her fridge? Two of them lead to a water tower with a body buried underneath in the dirt.
Lonely Cremation: His cremation is attended by exactly two people (not counting the cremator), his younger brother and the sister of the woman he murdered.
Retired Monster: A bullet to the head left him with severe brain damage, so he's unlikely to be a threat to anyone else. In the first season, he was still capable of making crude drawings, but by the opening of the second season, his condition has deteriorated to the point where he's bedridden.
A young El Paso girl, first seen at the police station being held overnight for shoplifting.
Hypocrite: While she berates Adriana for being a lesbian and encourages her to work less and marry a man, she and her lazy daughters were more than happy to live off of Adriana's paychecks until Daniela found work at a maquiladora.
Adriana's younger sister. She stopped going to school to work in a maquiladora.
Field Promotion: He gets an impromptu promotion to Prosecutor of the State of Chihuahua by the Mexican Attorney General in his first appearance onscreen.
Killed Off for Real: He is abducted and murdered in broad daylight by Juárez police because he was coming too close to exposing the abductions, rapes, and murdered conducted by police officers and had procured a signed affidavit from one of their surviving victims.
Naďve Newcomer: Treated this way by Captain Robles and everyone around him.
Wide-Eyed Idealist: Is intent on ridding corruption from the Chihuahua State Police, starting with Captain Robles and working his way to Fausto Galván, and tries to convince Marco to assist him.
The CEO of Grupo Clio Internacional, one of the largest holding firms in Mexico.
Played By: Bruno Bichir
Affably Evil: Is quite friendly to Marco when he and Sonya pay his company a visit while investigating.
Cerisola: In public, power is best wielded with a gloved hand, not a clenched fist.
Corrupt Corporate Executive: It's not known to what extent his relationship with Fausto Galván goes, but seeing how chummy they are with each other, you can expect some shady dealings. He brokered a deal with the Attorney General of Mexico to shut the DEA out of Juárez in return for less violence.
Morality Pet: Clearly loves his daughter Romina, who unfortunately is a junkie.
"Franco is a pseudonym. He is an assassin.
Played By: Júlio Cedillo
The Atoner: After immediately killing Raúl Quintana and seeing Jesus on his cross in the same room, he becomes guilt-ridden and later decides to "confess" to the El Paso Times reporters (who are wearing hoods) in a local chapel. Ironically, talking to reporters was exactly the reason why his last victim was murdered.
"Franco": But I was gentle in the end. I listened to them, wiped their tears, and let them have their moment.
Professional Killer: He is hired by Agent Alex Buckley of the CIA to kill Raúl Quintana for talking to the El Paso Times. He also murdered Raúl's friend Chuchito. He claims to have killed at least 243 people.