Sheriff Ed Bell
Sheriff Bell is an honest man of faith who values ethics, morality, and of course honesty. He values his presence in his community and feels proud of his position in society, meaning he also values the protection of his community.
Despite being a wise man with a good understanding of the world around him, being an 'old fashioned' man results in his failure to adapt and even accept the changing world around him - particularly the changing patterns and nature of crime.
Due to his seemingly caring nature, Sheriff Bell tries his hardest to protect Llewellyn Moss and Carla Jean Moss and put Anton Chigurh behind bars, but unfortunately fails to do so; this eventually makes him recognise his lack of power and control in the changing world he fails to understand.
Llewellyn Moss
Llewellyn Moss is a strong willed and self sufficient ex-Vietnam veteran with a very strong stubborn nature. Seemingly, due to his experiences in Vietnam, Llewellyn holds a different moral framework to most of the people around him, which contributes to his stubbornness; eventually, these morals and stubbornness lead to both his and Carla Jean's death since he refused Anton Chigurh's offer to spare Carla Jean in exchange for the money.
Despite rivaling Anton Chigurh, Llewellyn seems to reflect some of Chigurh's nature and habits; this could be to represent how it isn't important who is good and who is evil in this situation as they are basically as bad as each other.
Anton Chigurh
Anton Chigurh is a remorseless, relentless hit man with a strong appreciation for principles. Despite being a ruthless man, Chigurh still holds certain principles and seems to be one of the only characters with no care for the money; for example, Chigurh explicitly tells Llewellyn that he has to keep his promise to kill him despite not caring about the money.
Chigurh also seems to consider himself an arbiter of fate who holds his victims to letting 'fate' choose between life and death through a simple call of heads or tails. Chigurh likes to preach his own philosophy before he holds his victims to this coin toss routine, proving his strong belief in choice, chance and fate. Also, although Chigurh seems to be above the law, he is still subject to choice, chance and fate - as proven by his car crash at the end.
Despite seeming psychotic and practically crazy, Chigurh remains a simple man who relies on simple weapons like a bolt gun.
Along with being ruthless, remorseless and psychotic, Chigurh is also mysterious, as he disappears from the narrative the same way he arrived - out of thin air.