Gustavo 'Gus' Fring: The calm and calculated drug lord who ran Los Pollos Hermanos and had a hidden ruthless side.
Hector 'Tio' Salamanca: The wheelchair-bound former cartel member who communicated through a bell and had a vengeful spirit.
Tuco Salamanca: The volatile and unpredictable drug dealer known for his explosive temper and erratic behavior.
Jack Welker: The leader of a white supremacist gang who played a key role in the downfall of Walter White.
Lydia Rodarte-Quayle: The meticulous and business-savvy Madrigal executive who got involved in the drug trade.
Todd Alquist: The polite exterminator with a dark side, who worked with Lydia and became a dangerous ally to the White family.