In the world of Better Call Saul, there is no clear distinction between what is good and what is bad. On the other hand, whether something is legal or not is always clear and thoroughly discussed - but it only serves a few individuals when making decisions. A handful of characters on the show are lawyers, but that doesn't necessarily mean they automatically fall under the category of being lawful. Some are driven by personal reasons, such as jealousy, revenge, or just simply having fun.
Throughout the five seasons that have so far been released, many characters' moral alignments have shifted from better to worse. It is pretty evident that Jimmy McGill can be a real stand up guy, but he also has the capacity to act sleazy. Similarly, his brother Chuck continuously got worse and worse. Nothing is set in stone just yet. Until season 6 doesn't resolve certain plot points, there can be no final verdict about D&D moral alignments of the show's most complex characters.
Erin Brill: Lawful Neutral
Erin Brill is a first-year associate at Davis & Main with a bright future ahead of her. In season 2, Jimmy brought the firm the Sandpiper Crossing case and later on blew his chance to have a predictable and safe career, which was also one of the biggest mistakes he has made. Since he played by his own rules and ran an ad without consulting the partners, Erin was assigned to watch closely over him. To Jimmy, she is annoying as she represents a leash and lack of personal freedom, but in all truth, Erin was always diplomatic, polite and patient with Jimmy.
There are many lawyers on the show, but Erin follows the law with an almost religious zeal. She has no tolerance for Jimmy's chaotic shenanigans, which makes her a lawful neutral.
Viola Goto: True Neutral
Viola Goto is Kim's paralegal that appeared in season 4 and 5 as a minor character. She runs errands for Kim: she does her filings and looks up any kind of data that Kim might need. She is professional, calm, and reliable. While she works in law, she never comes across as particularly passionate about it. She represents balance in Kim's life, which makes her a neutral character.
Clifford Main: Lawful Neutral
Big on law, order, rules, and tradition, Clifford Main is the embodiment of lawful neutral. Even though Jimmy's unauthorized ad brought in many new cases, Clifford couldn't look past the fact that Jimmy did so behind his back, without the permission of the partners. Clifford is the kind of guy who is neither good nor evil. What defines him the most is his belief in what is right and wrong.
The reason he can't stand Jimmy is precisely Jimmy's total indifference towards established societal rules. Cliff is a man who can't stand anything remotely chaotic.
Rich Schweikart: True Neutral
Fair, professional and diplomatic, Richard Schweikart is first introduced representing Sandpiper Crossing, asking Jimmy to drop the case. Later on, he recruits Kim as the head of the banking division at his firm. By giving her freedom to define her own terms of employment, he showed her more respect than any other lawyer on the show.
He cares about the well-being of his firm and the employees. He called Kim out on her scam with Mesa Verde, but he didn't take any legal action or use threats. Rich doesn't like people who stand out of the crowd too much, which is the most evident in "Something Stupid" when Jimmy dominates the conversation at the office party.
Kim Wexler: Neutral Good
Kim Wexler is all about helping others - especially Jimmy. When she worked for Mesa Verde, she wanted nothing more than to go back to court as a public defender. Even though she is an exceptional lawyer, she is not exactly a law-abiding citizen. She does what she believes is good and she understands well that the law is not always just. That's why she decided to help Jimmy get Huell out of trouble: the charges he was facing were not proportional to what he has done at all.
Jimmy and Kim are the best partners in crime imaginable, but their relationship is also increasingly toxic. Kim might have been neutral good for most of the time on the show, but is slowly creeping towards becoming neutral evil.
Howard Hamlin: Lawful Good
In Kim's eyes, Howard might be the epitome of evil, but he is actually one of the most innocent and whole-heartedly good characters. The antagonistic relationship he has with Kim and Jimmy are not his fault; it is all Chuck's doing since Chuck liked to have his will enforced through Howard.
Howard is disciplined, honorable, and compassionate. He wanted to help Jimmy on several occasions. Besides Kim, he is the only person who saw just how intelligent and resourceful Jimmy really is. He blamed himself for Chuck's death because he kicked him out of the firm a few days prior to his death. Lawful good characters would never ever betray their partners, so it is no wonder Howard took his actions to heart.
Chuck McGill: Lawful Evil
Chuck knows the law inside and out, and so he always plays by the rules. He is disciplined and serious. He is envious of Jimmy as he is way more likable, charming and witty than Chuck. Since he used the law to take his brother down and was driven by petty revenge, Chuck is a lawful evil character. But deep down, he is an insecure broken man. It is easy to understand where he is coming from when he takes Jimmy to court.
His lawful nature and determination brought Chuck success and a professional reputation. He was always on the lawful side of the spectrum, but he started slipping from neutral towards evil as the seasons progressed. His maliciousness towards Jimmy was borderline illogical and crazy.
Jimmy McGill: Chaotic Good
Actions of Slippin' Jimmy aside, Jimmy is a free-spirited man with a kind heart. He exudes individualism, independence, and optimism. He leads an exciting life which is not devoid of pleasures. He might have conned his way into a resort, but the trick didn't actually hurt anyone. He is on a path to self-realization, but he soon realizes it doesn't lie in a conventional 9-5 for him. He dislikes authority and control, so it's no wonder he hated working for a huge law firm like Davis & Main.
His solo practice screams chaotic good. It appeals to those who like the concept of freedom, the most memorable character being Ricky Sipes who wanted to secede from the US altogether. Even though he lies sometimes, he wants the best for those around him, including his cold brother Chuck and Kim. The more serious the two became and the less personal freedom he had, the more unhappy Jimmy started becoming.
Saul Goodman: Neutral Evil
As Jimmy transformed into Saul Goodman, his moral alignment changed as well. They are different people with different interests. Even though he has done some shameless things before becoming Saul already, he never played with other people's fates before - at least not on purpose. Now, he calls himself the friend of the cartel and defends criminals at court. Saul Goodman has no regard for others and cares little about justice and honor, which is especially evident later on in Breaking Bad.
He uses the law when it benefits him and breaks it when it doesn't. In a way, Chuck was right when he likened Jimmy becoming a lawyer with giving a chimpanzee a machine gun. To advance his agenda, Saul will betray his own people and urge others to do so too. An example of such behavior is suggesting murdering Hank to Walter in Breaking Bad.