Jesse is impulsive and hedonistic, but also personable and possesses street-smarts. He talks in playful slang, frequently using words like "yo" and "bitch", and likes to wear garish clothing that follows the la trends in youth culture, plays video games, listens to loud music, takes recreational drugs, and drove a car fitted with hydraulics. Jesse's MyShout page lists his general interests as "Fine herbage! Keepin' it real, etc. Jesse often enjoyed hanging out and smoking with his friends, Badger and Skinny Pete, and purchasing items like a giant-screen television for his home or a Roomba vacuum cleaner.

Despite "yo" and "bitch" being the most famous and popular insult of Jesse, it’s worth noting that Jesse almost never uses the word to describe women. It's no surprise that Jesse does quite well for himself with the ladies. The two notable exceptions are when he used the word to describe Skyler White (not in her presence) and when he called his mother the word to her face. Also, despite his copious use of the word, he does not use it in the Pilot nor in the finale, Felina.

Jesse adores women and children, and harming one is a very good way to send him into a murderous rage. Using children in criminal activities is particularly heinous in his eyes. He has been shown to have personal connections with several children throughout the series, such as Spooge's son and Brock Cantillo.

Jesse also takes Todd's murder of Drew Sharp, a young boy, very hard and is furious that Walt and Mike decide to continue working with Todd. In fact, it is Sharp's death that finally pushes Jesse over the edge and causes him to exit the meth business once and for all.

While Jesse was not a very good student, his mother said that his chemistry teacher, Walter White, saw potential in him. Jesse would later deliver on that potential, producing a product on his own which Walt begrudgingly concedes is as good as what Walt himself produced. The meth that Jesse cooks in front of the Cartel chemists has a purity of 96.2%, making it possibly superior to that which was produced by Gale Boetticher who held an advanced degree in chemistry. Eventually, Walter even refers to himself and Pinkman as "the two grea meth cooks in America" ("Say My Name"). Despite being constantly underestimated, over the course of the series Jesse proves himself to be quick thinking and perceptive. Jesse also comes up with several clever plans, namely the magnet plan and his plan to get money from Neil and Casey.

Jesse has a serious reaction to killing Gale Boetticher, who, despite being a meth cook, is an otherwise decent and innocent person. Jesse does not take the experience lightly, the moment where he becomes a murderer changes him for the rest of the series from that point on. At first, Jesse has somewhat of a delayed reaction to what he has done; when Walt asks Jesse at the Denny's, "Seriously, are you all right?", he continues to eat his pancakes and bacon and seems completely fine, even in light of the terrible experience he had been through ("Box Cutter"). However, it later becomes quite clear that he is mentally damaged, and - in order to keep himself from reflecting on his guilt of the terrible thing he did - he surrounds himself with other people, keeping a 24/7 party going for whenever he is home from the lab. However, his subsequent killing of Joaquin Salamanca in self-defense appears to only leave him stunned for a moment ("Salud") and he doesn't hesitate at all to kill Todd Alquist ("Felina") or Neil Kandy and Casey, though he only threatens the two when he believes they are police officers, not wanting to harm cops. ("El Camino") However, the latter three killings were after Jesse had been held captive and tortured for months and after Todd murdered Andrea Cantillo. Another difference is that unlike Gale, the other four were criminals and not innocent people with all but Todd being in self-defense. With Neil and Casey, Jesse tried to avoid violence, but Neil left him no other way out.

In this sense, he needs to do anything and everything possible to take his mind off this terrible experience—hence the world’s biggest, or longest-lasting, party that he throws for himself ("Thirty-Eight Snub"). Jesse's preferred brand of cigarettes are Parliaments. In Season 4 however, commercial cigarettes were replaced with TV cigarettes, as we see Jesse smoking Wilmingtons, which only exist in the Breaking Bad universe. Jesse appears to be fond of the color red: All his own vehicles were red, his furniture and clothing usually have red in them, also his cellphone and his Roomba are red. He currently drives a beat down, red, 1986 Toyota Tercel 4WD station wagon. Jesse's email address is cpnjess@myshout.us.

Out of the series' entire cast, perhaps second only to Walt, Jesse's personality changes have been the most dramatic; most noticeably after Jane's death and Gale's murder. His time with Walt has transformed him from a laid-back jokester and much of the show's comic relief in the early seasons, to a troubled, woeful and sorrowful shadow of his former self as the series has progressed. As a result from looking after Brock and dating Andrea, Jesse became more caring towards children, even punching Todd in the face for killing a young man, even though he witnessed them doing illegal activities. Earlier in the series, after witnessing the severe neglect Spooge's son suffered, Jesse called 911 and left the line open to ensure the police would find both the murdered Spooge and his son, making sure the boy would get a better life. When carrying the boy outside, Jesse took care to make sure that he didn't see the carnage as well.

After escaping from the White Supremacist Compound, Jesse appears to suffer from post traumatic stress disorder from the brutal torture of the gang and from Walt's treatment towards him. While showering, Jesse experiences a flashback to being sprayed with water and has a violent reaction towards Skinny Pete and Badger after waking up and thinking he was back in his cell. When talking with Neil Kandy, Jesse states that if he's caught, he's dead anyway, suggesting that after his imprisonment by the gang he considers going to prison to be a death sentence for himself. Now dedicated towards starting a new life for himself, Jesse appears to have regained much of his old personality rather than the submissive one he was forced to take on during his captivity but with greater traces of violence. During his second confrontation with Neil Kandy and Casey, Jesse showed a pragmatic approach to the situation, only requesting exactly the amount of money he needed and brushing off the mockery aimed at the Colt Woodsman he was armed with. When the situation escalated into a Wild West-style duel, Jesse won because he secretly kept a second gun hidden in his jacket pocket which he used to kill Neil before exchanging fire with Casey. Throughout the conversation, Jesse kept the Woodsman on display in his pants, but kept his left hand in his jacket pocket and presumably on the other gun in case he needed it, something none of the men in the shop noted to be out of the ordinary. This led to Neil, Casey and the other men underestimating Jesse. When threatening the other men, Jesse responded to one telling Jesse that he had with a "do you think I give a shit?" before threatening to use their names and addresses to come after them if they told anyone what he did. However, it's unclear if Jesse actually meant his threats as he departed for Alaska shortly thereafter and may have just meant it as a means of intimidation and a bluff. ("El Camino")

Skyler's character started originally as a housewife who was clueless of her husband's criminal activities. She appeared to be the one wearing the pants in their marriage - making most of their decisions herself without any regard for Walt's own opinions - ranging from their financial decisions to things as trivial as dinner, likely adding to Walt's feelings of emasculation and inadequacy. She was very capable and willing to get her way in every matter that concerned the family and Walt personally, even planning an all-family intervention-style talk with Walter to utilize family pressure to convince him to undergo treatment and acting up when the talk didn't quite go her way. Nevertheless, she stood by her husband through lung cancer and took a part time job to support her family. However, Season 2 concluded with her realization that he had been lying to her about the source of his money, and Season 3 began with her intention of divorcing him after learning the truth. She hates the situation that her estranged husband has put the family in, but she's not willing or able to avail herself to the choice of getting Walt out of her life. She instead decides to do her part to make sure he doesn't go to prison and thus ruin her family. In a very pragmatic sense, Skyler remains married to Walt (a conscious decision because "spouses can't be forced to ify against each other, so there's that") and soon begins explaining his meth-gotten gains as gambling winnings from a card counting system, as well as using her bookkeeping skills to help Walter launder his money—all of which she does in order to help her family.

Skyler is the primary vehicle behind purchasing the car wash, which is, to her mind, the best fiction that she and Walt can tell the world about their source of income. The whole idea of this fiction that allows them to launder this money is very much a creation of Skyler’s, and part of Skyler's wish to keep the family together no matter what. Skyler goes to great lengths to write a script for she and Walt to memorize in order to convince Hank and Marie that they have come into this large amount of money through Walt’s illicit gambling. Eventually, Skyler's transformation into the manager actively laundering Walt's illicit gains deteriorates their marriage, making it somewhat of an unpleasant business relationship. In some ways, Skyler feels there is no reason for her to attempt to be a caring mother and wife when her estranged husband makes no bona fide effort at it either. As Skyler becomes further embroiled in illegal money laundering through the car wash, her survival instincts cause her to be incredibly cautious about making sure her and Walt's story stands up to scrutiny—this is demonstrated when she criticizes Walt for buying expensive champagne and a costly Challenger sports car for Walt Jr., both of which contradict their story of living on the edge.

Skyler's frustration with her situation with Walt gets to her in several ways: she smoked while pregnant and around her baby, started sleeping with her boss Ted Beneke, and staged a suicide attempt to voice her disgust with Walt's moral decline. Skyler, it appears, can sometimes act with pride and a controlling personality. When she goes to make sure Ted Beneke pays his IRS debt and he pointedly brushes her off (she is also frustrated that he bought a new Mercedes with the money and is considering hiring a tax attorney to try and get a better deal from the IRS), she can't help revealing to him that she was the source of the $600,000 that Ted was told by Saul Goodman had been left to him from his "Great Aunt Brigid's" Luxembourg estate.

Skyler's actions for the sake of the family sometimes left collateral damage to those around them, such as the accident involving Ted Beneke. Another side effect of this action is that she gave away all the money Walt needed to have a "disappearer" take the family to a new life, forcing Walt to take extreme measures with Gus since escaping was no longer an option. But unlike Walt, she chooses to accept the reality and horror of her actions (as painful as this is to her). She becomes terrified of Walt following the murder of Gus Fring and Walt's voluntary re-entry into the Meth business. But her resolve to protect the family remained intact, and she seemed to be at greater ease following Walt's retirement ("Gliding Over All"). Once Hank finally caught on to Walt's former activities, she remained loyal to Walt for the sake of protecting their children. After Hank's death and Walt leaving town, she is forced to defend herself from federal prosecutors accusing her as an accomplice to Walt's crimes. When Walt returns to say help her and say his final goodbye, she is noticeably thinner and appears to be a shell of the person she once was. Once Walt finally confesses that everything he did was for himself, she appears to feel some sense of relief. She is last seen observing Walt feel their daughter for the last time, with what looks to be a soft smile on her face ("Felina").

Boisterous and outspoken by nature, Hank can sometimes come off as rude or insensitive to the viewer or to other characters. His cavalier attitude causes him to believe that having friends and co-workers of color gives him a free pass to call Mexicans "beaners," and that working for the government entitles him to certain contraband perks, like Cuban cigars. In some ways, Hank is introduced as the antithesis of Walt, in a good way: he's popular, cheerful, successful, and constantly bragging about his skills. Walt dislikes it when Walter Jr. looks up to Hank, yet he loves Hank on some grudging level, at one point making it very clear to Saul that Hank is family. Hank has shown himself to be a good law enforcement agent and competent investigator who was able to expose Gustavo Fring for what he truly was. Despite his skills, Hank's image of Walt as a mild-mannered chemistry teacher blinded him from discovering, for a whole year, that the mysterious drug kingpin "Heisenberg" he was pursuing so vigorously was under his nose the whole time (although, admittedly, Walt's cunning schemes and lies to cover his tracks can be credited for Hank's continued ignorance as well).

In the course of his work, Hank is promoted to the prestigious yet more dangerous base in El Paso, Texas from Albuquerque for a short time, but experiences a traumatic event courtesy of the Mexican drug cartels and moves back to Albuquerque. This experience leaves him with enduring, debilitating anxiety attacks. These attacks, which reveal a more vulnerable side to Hank that he tends to disguise, increase in intensity after two brutal members, The Cousins, ambush Hank leave him with a debilitating injury. After the Cousins' shootout, Walt realizes he's partly responsible for Hank's situation and thus saves him from Gus by the end of season 4.

Hank has a cavalier exterior, but the dark side of his job affects him more than he cares to admit. Despite his considerable shortcomings, Hank is basically a good-hearted family man. Although he is loud and opinionated, he is competent at his job and, before learning Walt's secret and Skyler's complicity, cared deeply about his in-laws. Hank brews his own beer, which he has named "Schraderbräu", in his garage, and enjoys playing fantasy football. Hank drives a midnight blue 2006 Jeep Commander until he is attacked by the Cousins. After he is well enough to drive, he drives a silver 2011 Dodge Durango. During his incapacitation following the attack by the Salamanca cousins, Hank started collecting minerals as a hobby. On several occasions, he irritably corrected people (especially Marie) when they referred to this activity as "rock collecting" ("Thirty-Eight Snub").

When Hank finally finds out that Walt is the meth kingpin and mastermind "Heisenberg" he has been searching for, he feels betrayed, humiliated, and vengeful towards Walt, swearing he will put Walt "under the jail." He plots even more feverishly to destroy Walt, trying to gather the evidence from Skyler and trying to persuade Jesse to give Walt up. Hank's single mission in life becomes trying to get Walt to pay for his crimes, and he becomes deeply invested in making sure Walt doesn't die of cancer before he can be convicted. Even after being blackmailed into silence by Walt and Skyler, Hank refuses to give up and continues to try and find a way to put Walt behind bars. Despite knowing that exposing and arresting Walt would mean the end of his DEA career, due to Walt operating for so long beneath his nose, he continues anyway. Jesse, furious at Walt for other reasons, forges an uneasy alliance with Hank, and Hank allows Jesse to stay at his house, seeing him as his only option of bringing Walt down and refuses to risk his safety by putting him in DEA protection. Hank's strong desire to bring Walt down is evident when Jesse states that he is afraid Walt will kill him at a proposed meeting and after leaving the room, Gomez is worried that the "kid" might be right about the meet being a trap and Hank corrected Gomez by saying "Oh, you mean the junkie murderer?" Hank clearly believes Jesse is just as guilty as Walt is for the crimes they have committed (most notably the Gale murder, and the manufacturing of crystal meth under Walt's drug empire). Hank tells Gomez that if Walt does kill Jesse, at least they'll get it on tape, showing that he does not care for Jesse much and is willing to sacrifice him in order to catch Walt. After tricking Walter into leading them to the location of his buried drug money and confessing to a multitude of his crimes, Hank finally succeeds at his mission to bring his brother in law to justice and is filled with joy. Unfortunately, this is short lived as Hank is almost immediately caught in a gunfight with Jack and his gang, whom Walt had called to rescue him, leaving him wounded and defeated.

Even in his final moments, Hank maintained his composure and a remarkable display of courage, even though Jack sadistically played along to Walt's offer that he would spare Hank if he agreed to let them go. Hank saw through this facade and refused to sacrifice his dignity and beg Jack for his life. He possibly gains back some small amount of respect for Walt, due to his pleading for his life and no hesitation of offering up his money to save his life, despite everything Hank had done to Walt to try and take him down. To this end, Hank accepted his death despite Walt's pleas, knowing full well that Jack intended to kill him anyway. Hank met his fate with the same disposition that he carried throughout his life. This is a direct contrast to Jack himself, who lacked the intuition Hank possessed and attempted to save his own life by attempting to bribe Walt with the promise of telling him the location of his money when faced with death, even though Walt had already made up his mind for revenge after Jack killed Hank.

Despite his soft spoken nature and child-like fascination with the criminal underworld, Todd has proven himself to be a more than capable criminal, and will normally act on instinct when he feels that the secrecy of his occupation is in jeopardy. Todd's primary motivation seems to be gratification from his employers, rather than greed or morality, and will go to great lengths to please them. His relationship with his employers is always one of respect and loyalty, and will execute any command unflinchingly and without remorse, shown when he executes Drew Sharp because he witnessed them steal the methylamine, and then keeps the boy's tarantula. His attitude towards his uncle and his uncle's gang is more familiar, and though he shows an eagerness to impress them with his abilities, he does not show them the same sycophancy that he treats his bosses with. He also appears to be infatuated in Lydia, a sentiment not reciprocated. Based on certain aspects of his personality, its safe to say that Todd is a sociopath. Yet, strangely enough, Todd usually appears to mean well, offering Jesse ice cream while simultaneously keeping him as a slave cook. He also tells Andrea that it isn't personal before he shoots her, and regretfully tells Walt that he shouldn't have come back when he goes to the gang's clubhouse. Nonetheless, Todd is willing to do whatever it takes to secure his criminal enterprise and please his uncle Jack and the rest of the gang.

A defining characteristic of Gus is the friendly and low-key exterior he maintains; he takes an active role in managing his front businesses and personally supervises employees and serves customers at his Los Pollos Hermanos restaurants. Quiet and humble, he is incredibly cautious about with whom he does business and keeps a very healthy distance from the product he sells in order to appear almost invisible. Despite being a sociopath and a multi-state meth distribution mastermind, Gus carefully maintains a public profile of propriety: noticeably, he is a major booster for the DEA and has made large donations to the agency's Albuquerque office. Gus is so successful, in large part, because of his cautious nature - he plans ahead and has the patience to let his business grow slowly. As part of his scheme to "hide in plain sight", he drives a modest dark blue 1998 Volvo V70 (Hank even laughs to Walt when he begins to think Gus is a drug kingpin, "The guy drives a ten-year-old Volvo! It's brilliant!").

However, Gus is ruthless and machiavellian in managing his vast drug empire, keeping the entire operation under his icy control. Gus admires professionalism and caution in his colleagues, and is generally calm and calculated. He employs a number of enforcers and has personally killed rivals and associates. In interviews, Giancarlo Esposito said he made the choice to make Gus "graceful." He described him as "someone who is poised to take over the cartel, someone who is poised to manipulate other people into doing what he needs them to do." Gustavo doesn't trust anyone who isn't as cautious as he is, as they are too unpredictable, and he prides himself on being several steps ahead at all times. Gus is thus controlled, cold, powerful, and menacing.

However, Gus has been shown to genuinely care about people, noticeably Max Arciniega (the other "hermano" of the Los Pollos Hermanos brand name), who Gus took off the streets of Santiago, put through school, cared for and was interested in developing his potential. The humanity of Gus' personality played an integral role in his development, especially the very deep relationship with Max, which has been interpreted by some viewers – and even Giancarlo Esposito himself – as possibly homosexual. The loss of Max is partially what turned Gus into a ruthless villain, who is not above anything when it comes to avenging Max's death, including the murder of children (like Tomas Cantillo) and the gradual killing of Hector Salamanca's entire family. However, the loss of Max is also what cultivated Gus' desire to create a new "family" by empowering his illicit meth empire, as well as the chicken restaurants. Vince Gilligan has stated that he decided against the show officially confirming or denying whether or not Max and Gus were, in fact, lovers; however, he also said that they "probably were lovers."

Initially, Giancarlo Esposito was offered to play a character that was described to him as "very admirable, very polite", and he decided to play that character as if he had "some kind of a secret". Without knowing what that secret was, Esposito understood the potential Gus had as a growing character, therefore rejecting offers for guest appearances and insisting on becoming a series regular. In order to achieve Gus' trademark calmness, Esposito utilized yoga classes he had been taking regardless of the series, which allowed him to convey the character by "being a good listener".

There is a fair amount of information that is unknown about Gus's past. Gus left Chile in 1986, the same year in which the Manuel Rodríguez Patriotic Front attempted to assassinate Pinochet. Although there are no existing Chilean records of Gus, there are two instances which demonstrate his likely involvement in the Pinochet government: Hector Salamanca refers to Gus as "Grand Generalissimo" in a flashback, and Don Eladio tells Gus that he is "not in Chile anymore", but spares his life because he knows who Gus really is. A possible interpretation of Don Eladio's line is that they spare Gus because killing him could put them at risk of being subject to retaliation that their association with the cartel cannot protect them from. Gus appears to be quite proud of his Chilean roots, even preparing Paila Marina, a traditional Chilean seafood dish, for both Walt and Jesse. He tells Walt, "It's just like my mother used to make it."

Gus is also a man of honor as he reimburses any damages done to the property of his employees such as their cars when performing duties he requires them to.

Mike is shown to be a highly intelligent, cunning, patient, formidable and caring person and is a highly skilled investigator and expert soldier and assassin. Although Mike doesn't seem to feel even a bit conflicted about the crimes he commits, he also isn't terribly interested in gratuitous cruelty or shooting his way to the top of the meth lord food chain - he just does what's necessary to keep himself and his boss safe, with a minimum of ego-tripping and drama.

Mike has demonstrated extreme devotion to his loved ones, notably his beloved granddaughter, Kaylee, whom he planned to leave all of his funds earned from his criminal work and also his daughter-law, Stacey, whom he also sought to aid financially. Mike sincerely loved his son, Matt, as well and was truly devastated by his death and personally avenged him by mercilessly killing Officers Troy Hoffman and Jack Fensky, his son's killers. Mike has demonstrated that he is willing to to anything to protect his family from danger as seen when he attempted to assassinate Hector Salamanca due to him threatening Stacey and Kaylee.

Due to his past as a cop and soldier, Mike is a highly proficient killer and will kill whoever is a threat to him or his employer's interests as he single handily killed numerous Cartel assassins during the war between them and Gus. Mike was extremely loyal to Gus and was valued as a core member of his drug empire. While he was shocked at the sight of him killing Victor, one of his allies, he refused to aid Walter in killing Gus and remained loyal to him fully.

Unique to Mike, his reasons for working in the criminal underworld, was entirely to help his daughter-in-law and granddaughter. He was severely angered at Walt's killing of Gus, which in turn exposed his activities to the DEA and cost him his $2 million fortune he was planning on leaving for his granddaughter. His devotion to his granddaughter was so great that he did not even touch any of that money, which is the only reason he was the only person from Gus' ring that wasn't arrested by the police.

Mike was extremely good at reading people and was one of the few people to recognize Walter White for the prideful, egotistical and arrogant man he was and severely despised him. He hated Walt for his actions that exposed Gus' and his own criminal activities and the only reason he agreed to work with Walt was for the sake of making money to leave behind for his granddaughter and financially support his men in prison. He also hated Walt for his hypocrisy as seen during their final confrontation in which he brutally ranted of how his actions are what lead to complete disaster following Gus' death after Walt accused him of screwing up and getting followed by the DEA, which in turn resulted in his unnecessary death at the hand of Walt.

Jimmy McGill is a highly intelligent, cunning, manipulative person who is a dedicated criminal lawyer and also a complete conman at heart and overall is a person who will resort to whatever measures to achieve his own goals or protect his client's interests.

Better Call Saul overall charts Jimmy's transformation into a dedicated and effective criminal lawyer. Jimmy is introduced as a struggling attorney, often forced to defend clients in loser cases and overall barely makes ends meets, and to make matters worse, his highly successful lawyer brother Chuck, is mentally ill and Jimmy takes it upon himself to care for his brother. Despite this, when he first introduced Jimmy is nowhere near the person he will eventually become and is a kind and caring person who desperately wants to be successful and put his lawyer skills to good measure. He has good relations with most of the people he knows notably Kim and Chuck, and with the exception of Howard Hamlin whom he despises.

In spite of this, it is gradually revealed that Jimmy is truly more conman than a lawyer, and throughout the series, it is shown that Jimmy has been a crook from an early age, in which he stole from his kind father's corner store, eventually resulting in it's bankruptcy and his father's death and engaged in multiple con games in order to steal money from unsuspecting victims. It was only after being arrested for defecating through a sunroof and facing serious charges that Jimmy gave up his life as the master conman "Slippin Jimmy" and moved with his brother to Albuquerque. Jimmy has never expressed any signs of remorse for his con artist past, nor the damage he inflicted on others, notably his father and overall enjoys the thrill of tricking people and furthering his own interests.

Jimmy's relationship with his older brother Chuck was one of the primary catalysts for his transformation into a criminal lawyer as Chuck was shown to despise his brother for his manipulative and delinquent ways and took every opportunity to sabotage him in order to prevent him from becoming a successful lawyer as he knew that Jimmy would always be a conman and resort to unethical measures to get his way, though Chuck's attempts would only fuel the fire and would push Jimmy closer and closer to his true criminal nature.

Throughout Better Call Saul, Jimmy eventually transforms from a struggling attorney focused on doing the "right" things into a master manipulator and reverts back to his conman persona. He is shown to be willing to resort to whatever measures necessary in order to gain clients and to ensure that his clients, who are complete criminals, avoid arrest such as manipulating police, fabricating evidence and even stealing from his clients for blackmail purposes. Despite this, Jimmy still uses his manipulation skills for good as seen when he saved two of his comrades from being murdered by Tuco Salamanca by talking him down to breaking their legs instead and also sabotaging his brother Chuck's files in order for Kim to get her clients back. Regardless however, Jimmy is vain, arrogant and selfish. He is completely focused on his own interests and is willing to ruin people's lives in the pursuit of his interests. For example, he turned an old woman's friends against her just in order for her to settle on a large case and receive his cut. Mostly, he proves his brother's mental illness in court in order to get off easy following being arrested and charged as a result of Chuck's actions, even through he was truly guilty in the manner. Jimmy is also spiteful as well as seen when he deliberately revealed his brother's mental illness to an insurance company for revenge for his actions and this would eventually be the one of the primary catalysts leading to his brother's tragic suicide. Despite this, Jimmy felt enough remorse to repair his mistake with his client by purposefully exposing his actions in a way that repaired the woman's friendships and presumably destroyed all of his own credibility with his clients in the process. However by the fourth season of Better Call Saul, Jimmy is shown to be even more cruel and non-caring as he shows barely any remorse for his older brother's tragic suicide, despite the fact that he is partly responsible and happily allows Howard to feel all the guilt over the situation; in a way following his brother's advice to no longer feel remorse for his actions and embrace who he is. Jimmy is shown to be willing to resort to even more extreme measures to get his way such as threatening three teenage thieves with death if they interfere with his drop phone service and feigning remorse for his brother's death simply to get reinstated as a lawyer and gleefully mocking the panel afterwards to Kim.

By Breaking Bad, Jimmy McGill is no more and Saul Goodman is all that remains. He is shown to be a complete criminal lawyer who maintains extensive connections within the criminal underworld, and serves as a go-between connecting drug distributors, evidence removers, impersonators, and other criminals-for-hire. Despite his flamboyant appearance and mannerisms — punctuated by his outrageous low-budget TV commercials — Saul is a highly competent lawyer who is able to solve problems and find loopholes in order to protect his clients. He is also not without integrity as he is shown to honor the ethical concerns of his profession, particularly the attorney–client privilege, and is reluctant to be associated with violence or murder unless absolute necessary. He has served as an adviser for Walter, Jesse, Mike, and even for Skyler, whom he also helped acquire a car wash in order to launder Walter's drug money. With a sleazy manner that is sometimes bordering on comical, he might seem disreputable to police and certain other lawyers. Despite his fantastically shady appearance, Saul is indeed a highly competent extra-legal operator, adept at sniffing out legal loopholes and able to negotiate cherry deals on the behalf of his clients

Saul is shown to have an extremely poor moral compass and is more than willing to destroy lives in order to help his clients, as seen when he blackmailed Jesse's parents to sell their property to Jesse at half price by threatening to disclose the meth lab that had been in the basement and even murder does not faze him as he suggested numerous times to Walt to permanently remove a threat, notably Jesse and his brother-in-law Hank Schrader. However, Saul's ethical limits are glimpsed when he tried to cut ties with Walt after learning that he had been used to send a young boy to the hospital. Saul is somewhat of a coward as well as he was intimidated numerous times by his primary client, Walt and likely feared death if he did not follow Walt's orders. Ultimately, allowing Walt to control him and helping him with his criminal activities would lead to Saul having to abandon his beloved life as a criminal lawyer and flee to Nebraska to living in hiding.

After abandoning his life in New Mexico and becoming a cinnabon manger in Omaha, Nebraska, as Gene Taković he appears to be a shell of the man he once was, living in complete fear of being exposed and arrested and is shown to be devastated over the loss of his former life, often watching old videos of his commercials and weeping throughout them.

Marie is not necessarily the most likeable person in the world - she has a tendency to be shallow, vain, and snobby, along with obsessive-compulsive tendencies and other neuroses. Noticeably, she apparently suffers from kleptomania when she's stressed, once driving her to steal an elderly couple's framed photo of themselves during an open house for which she created an entire fictional identity ("Open House"). She saw a therapist named Dave for her obsessive shoplifting. However, Marie genuinely loved her husband Hank and extended family, and did the best she could to help him when he was recovering. Marie doesn't hesitate to offer advice to others, but often fails to practice what she preaches. Nevertheless, Marie is supportive of her family especially her husband, even after Hank got shot Marie tried to motivate him in his therapy and was excited about his progress, but Hank brushed it off leading Marie to start her stealing again. She is also quite impulsive, not thinking through her actions, even though she has good intentions at heart. One example was taking Holly away from Skyler when she learned about the meth business Walt and Skyler were involved in, even though there is no evidence to prove it, and she could have been charged with kidnapping if Hank had not stopped her. Another example was when she told Hank to tell the DEA that Walt is Heisenberg, not realizing if Hank submitted such a story without physical evidence, he would be fired from his job.

She appears self-centered, shallow, sharp, and opinionated, but is very devoted to her husband and cares deeply for her sister's family. She disliked a pair of her shoes, calling them "ugly white squeaking around after old ladies shoes" that she says give her support. In this instance, she very deftly swiped some new ones from a shopping mall, leaving her ugly white squeakers behind. While she has never been shown to be at her job during the show, she is often seen with her white lab coat for her X-ray technician work. She is "thinking about a move up to management". The sisters briefly fell out when Marie gave Skyler a stolen tiara for her unborn daughter, but Marie, who was receiving treatment for her kleptomania, eventually apologized and she and Skyler reconciled. However, their relationship seems to be permanently destroyed when Marie learns the truth about Walt's criminal activities, disgusted at Skyler both for her refusal to aid them in taking Walt down, as well as her continued loyalty in Walt. Their relationship continues to dissolve even more as Hank continues to hunt Walt, such as when Marie watches Walt's false confession. After Hank finally arrests Walt, Marie (unaware of Hank's death) attempts to give Skyler a chance to redeem herself by handing over Walt's "obscenity" (the false confession video) and revealing the truth to Walter Jr, however, the final blow to estrange the sisters comes when she learns that Hank is dead and that Walt remains free.

After learning that Walt is a meth kingpin, Marie begins to demonstrate a darker side. She tells Hank that he must apprehend Walt at all costs and even says straight to Walt's face that he should just kill himself in order to free the family from the burden of his criminal activities. She even seems to have fantasies of killing Walt herself as implied during a conversation with her therapist in which she discusses her fantasy of poisoning Walt (under the guise of a "family friend") and claims that while she will hurt nobody, it feels good to think about it. It is evident that Marie deeply despises Walt for the atrocities he has committed and what he has done to the family and clearly wants him dead or captured at all costs.

Marie seems to strictly watch her weight and is big on eating healthy, low fat food. It is implied that she is a Whole Foods store fan. She appears to harbor an obsession with the color purple; she is almost always portrayed wearing purple and many elements of her home decor, including her kitchen appliances and bed linens, are matching shades of purple. However, some fans imply that it is not Marie, but Hank who is a fan of purple, as Hank wears purple clothing at several points in the show, and Marie doesn't wear any purple at all after Hank's death. Marie appears very sullen in the aftermath of this drama.

Marie also has a rather annoying habit of talking quickly about several subjects at the same time, and she also has trouble believing people when they tell her to stop talking.

Elliott Schwartz is Walter White's old college science partner and co-owner of Gray Matter Technologies, a successful pharmaceutical company co-founded by Walter. Gretchen Schwartz, a former romantic interest of Walt, is Elliott's partner in the business and is his wife.

Gretchen Schwartz is Walter White's old college chemistry partner and now co-owner of Gray Matter Technologies, a successful pharmaceutical company. A former romantic interest of Walt's, she is currently married to Elliott Schwartz, with whom she also manages Gray Matter.

Lydia is a very high-strung and nervous character, and displays these characteristics even more so when she is under stress. She seems to suffer from panic attacks based on the fact that she will sometimes breathe quickly and lightly from her upper-chest, rather than taking deep breaths from her diaphragm. Lydia may have abetted Gus' criminal activities (de-listing methylamine barrels as they arrive, which Ron Forenall then ships to Golden Moth Chemical, which Duane Chow then ships to the lab), but it is clear that she is much more concerned about the blowback from Gus' death landing on her. This fear causes her to go to lengths to make an 11-person kill list of everyone who might tie her to the superlab and Gus's drug empire and asks Mike to take care of them all .

Right before Hank and the other agents show up at the Houston office, Lydia realizes that she has put on two different shoes, and after the DEA leaves she screams into a throw pillow. It is revealed that Hank did not miss that clue to Lydia's possible involvement as a link between "Burgermeister Meisterburger" in the German home office of Madrigal and Ron in the warehouse. Lydia is also prone to exaggeration, telling Mike that 14 DEA agents were screaming and yelling at her, and swarming all over the warehouse.

Despite her uptightness and energy, she can be cunning and quite ruthless when it comes to eliminating (such as Chow) or ratting out (such as Ron) other members of the organization to save herself. She is cold and calculating, and seems very much in control of her destiny: she chooses time and again to pursue the lucrative meth business, completely insensitive to the human cost. She gets lucky, though, when implacable, unstoppable Mike chooses to let her live instead of leaving her dead in a ditch somewhere. Now bartering methylamine for her life, Lydia gets lucky once again when she and Jesse discover DEA trackers attached to the barrels of methylamine they're about to steal, saving them all from prison.

However, since that means she's no longer useful to the meth operation, her life is forfeit until she suggests a heist on a train which is carrying a tanker of methylamine, to fulfil all their precursor needs. Even when she is terrified and backed into a corner, Lydia has the audacity to ask for a cut of the money from the train heist.

In addition, when Mike was ready to kill her in her own home after she ordered the hit on him, she pleaded to Mike not to make her "disappear", even if her daughter saw the body. She wanted her daughter to see the body if Mike killed her so she would know her mother hadn't abandoned her. She seemed to see abandonment as far worse to scar a child than seeing her mother dead, showing possible hints to abandonment in her or her daughter's past. It is possible that the father walked out on them.

Lydia is, in many, ways, very much similar to Gus: Both are consummate business people, who dress perfectly and try to approach the meth trade with a degree of professionalism not normally seen in the "game". However, personalitywise, they are complete polar opposites: Gus is calm, unflinching and relatively reasonable, while Lydia is paranoid, unpredictable and unwilling to accept the brutality of the drug world. The contrast is best illustrated in Gus' massacre of the cartel vs. her using Jack Welker's gang to dispose of Declan and his crew - Gus moves between bodies without fear while taunting the remains of his enemies, while Lydia plugs her ears not to hear gunshots and later has to literally be guided by hand with her eyes closed through the carnage.

Personality wise, Lydia is also very much similar to Walter's own during the first season: She dispatched others to do her dirty work for her, and is a constant nervous wreck of her criminal life affecting her personal life. Just like Walter, Lydia is also obsessed with cutting off any loose ends that may implicate her, and even displays some of Walt's cold arrogance when she orders the death of Walter himself, as he could implicate her. The big difference between the two is that Walt has no qualms with getting his own hands dirty, and has become hardened by his experiences while Lydia still depends on others to do dirty work for her, and is often reluctant to look upon death, particularly that which she had caused. This is contrasted in Better Call Saul, she is much more composed and confident back in 2003 in the early days of her involvement in investing and transportation of meth using the huge corporation she works for as a front and totally uncaring about Mike's questions when he wonders out loud in her office that she's risking a lot for just a drug dealer, which she scoffs at and says if he thinks that's all Gus Fring is a good example of that.