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America Ferrera as Amelia "Amy" Dubanowski (née Sosa): A Cloud 9 employee who works as an associate and floor supervisor before being promoted to store manager. Amy always wears a different name tag because she does not like strangers using her real name. Amy has a teen daughter with her high school sweetheart, Adam; though they divorce, Amy later has another child with Adam. In the second episode of season 6, Amy leaves the store for a corporate position at Cloud 9, but she returns for the final three episodes.
Ben Feldman as Jonah Simms: A Cloud 9 sales associate. A college student who dropped out of business school, Jonah initially struggles with working a customer service job, something he hides from his upper middle class family. He and Mateo are both hired by Dina in the series' pilot episode. While he dates other women during the series, his attraction to Amy is obvious. He moves in with Garrett, after losing his house to the tornado at the end of season 2.
Lauren Ash as Dina Fox: Cloud 9's intense and no-nonsense assistant store manager. She has worked for Cloud 9 for over 10 years and has a strong, forthright demeanor. She is a strict vegan which is temporarily compromised in S3:E9 "Golden Globes Party" to show her dedication to friendship. She shares her apartment with a large collection of birds whom she calls her babies.
Nico Santos as Mateo Fernando Aquino Liwanag: A Cloud 9 associate. After finding out that he has unknowingly been living as an undocumented immigrant, he tries to keep his status a secret, but he is arrested by ICE at the end of season four. Eventually he becomes an assistant to the manager, the only job he can be hired for without corporate becoming involved. He is gay and was romantically involved with district manager Jeff (Michael Bunin), and later with Amy's brother Eric. In season 6, he and Eric get engaged and in a flash-forward at the end of the last episode they are seen showing off their wedding rings.
Colton Dunn as Garrett McNeil: A sarcastic and indifferent Cloud 9 associate who is a wheelchair user. He is also the in-store announcer, in which capacity he often offers his acerbic commentary and dry humor. He and Dina are dating by the end of season 6, following an on-again, off-again relationship throughout the series.
Nichole Sakura as Cheyenne Taylor Lee: A Cloud 9 associate later promoted to floor supervisor in the sixth season. She is a pregnant high school student at the start of the series. She gives birth to her daughter, Harmonica, in the store in the first-season finale, and married her boyfriend, Bilbo "Bo" Derek Thompson (Johnny Pemberton) during the second season. Sakura was originally credited with her stage name of Nichole Bloom before returning to using her birth name in the final season.
Mark McKinney as Glenn Sturgis: Cloud 9's incessantly positive store manager until late in season 4, when he steps down and becomes an associate–and later floor supervisor–to spend more time with his family. After Amy leaves in season 6, he becomes manager again. Glenn is a devout Christian and is a foster father to many children. He has a biological daughter of his own in season 4, with Dina as the surrogate for him and his wife, Jerusha (Kerri Kenney-Silver).
Kaliko Kauahi as Sandra Kaluiokalani (season 5–6; recurring season 1–4): A meek Cloud 9 employee who has trouble standing up for herself. Throughout the series, she slowly starts to speak up when being wronged. In season 5, she marries Jerry (Chris Grace), and the pair later adopt Glenn's 17-year-old former foster son, Tony (Benjamin Norris).