Ensemble Dark Horse / The Mandalorian

• Although he doesn't appear all that much, and only during Season 1, the Client was a big hit with critics and fans alike, for being played to charming perfection by one of the most experienced actors in the whole cast and getting some of the best lines in the whole show.
• Paz Vizsla, the hulking Mandalorian heavy infantryman (voiced by Jon Favreau himself), for being a relative of Pre Vizsla and for being The Big Guy in an especially badass suit of Mandalorian armor who nevertheless comes to the title character's aid (along with the rest of his brothers and sisters) with a jetpack and a backpack-fed minigun. The Book of Boba Fett would eventually reveal him and Mando as the only surviving males from their tribe after the invasion of their Nevarro covert.
• Omera, the beautiful frontier widow who's curiously a crack shot with a blaster, helps take care of The Child, and gets tantalizingly close to offering the Mando a peaceful life and a chance to settle down. As portrayed by part-Native American actress Julia Jones, she also provides a rare example of an indigenous woman taking on a heroic Star Wars role without getting fridged. Sure, everyone in the audience knows how her total Seven Samurai / Magnificent Seven ripoff of a debut episode is going to end, but that doesn't make it any easier to say goodbye to her and many are hopeful she will make a return.
• The two Scout Troopers at the start of Chapter 8 quickly endeared audiences with their hilarious banter over Moff Gideon's Bad Boss tendencies, citing it as if it were another day at the office, and we get treated to another demonstration of their infamous poor accuracy when they start shooting at a can out of boredom. And keep in mind, these are the same guys that killed Kuiil and captured the Child at the very end of the previous episode! And they hit the Child here. Their time is ended in hilariously brutal fashion as IG-11 demonstrates how breakable organics' bodies are compared to high-end combat droids.
• The Mandalorian Armorer is well-liked for her especially cool armor, unwavering loyalty to the Creed, and the aura of mystery around her character. The scene where she absolutely destroys five Stormtroopers with nothing but her hammer and tongs certainly didn't hurt her popularity any. Jon Favreau originally planned to kill her off at the end of Season 1, but instead had her not only come out victorious, but reappear in other Star Wars shows.
• Fennec Shand was an instant hit for being a badass Dark Action Girl played by fan-favorite actress Ming-Na Wen. Despite only having about ten minutes of screen time in the first season, she was popular enough with fans to be brought back for not only the second season but also for other Disney+ shows, such as The Bad Batch and The Book of Boba Fett. In the latter, she became the only character to appear in every episode of the first season.
• Cobb Vanth, who previously debuted in The Aftermath Trilogy of novels, became a beloved character after appearing in this show for being a humble sheriff-type character, to the point that some viewers even hoped Mando would let him keep Boba's armor. Also doesn't hurt that his Emmy-nominated actor had previously done a great bunch of well-liked sheriff roles, and it was enough to have some fans smitten. The fans weren't the only ones smitten either; Katee Sackhoff and Ash Crossan referred to Vanth as a "space daddy" in an interview, expressing their admiration for the way his hips moved in the costume and how comfortable he was in the gunslinger role.
• Frog Lady from Chapter 10 is well-liked for being an engaging alien character, the comedy of how terribly her trip with Mando goes, and her adorably loving relationship with Frog Man (also called Frog Husband by fans) depicted in Chapter 11.
• Elia Kane, Moff Gideon's lieutenant for being the first live-action female Imperial^note Not counting the motion-captured video games or any First Order soldiers, as well as being played by an attractive LGBT actress, which has made her immensely popular in the LGBT Fanbase. Her popularity with fans resulted in her returning in the third season episode "The Convert", where she is integral to the plot.
• The Crouching Moron, Hidden Badass Jawa tribe which Mando fights (and basically loses to) in the second episode won both themselves and their species a lot of fans.
• Peli Motto earned love from viewers, and from other Mandalorian cast members, thanks to Amy Sedaris balancing her incongruous and show-stealing sense of humor with a hardworking attitude and respect towards innocent otherworldly visitors. Peli would go on to make a brief cameo in The Book of Boba Fett Chapter 3, appearing in the spin-off before Mando himself would.
• Dr. Pershing intrigues viewers who believe his efforts to protect the Child from death at the Client's hands in Season 1, and then to unconditionally guide the Mandalorian to the kid's prison cell in the Season 2 finale, make him Moff Gideon's least evil accomplice. He later gets an entire episode in Season 3 to himself.
• The Tusken Raiders finally get treated with some respect in the Star Wars canon in this show. Mando even perfectly knows how to negotiate with them, with both Mandalorians and Tusken Raiders basically being very similar.
• Migs Mayfeld, the Imperial sharpshooter-turned-mercenary, became one of these after his second appearance. While he was portrayed by Bill Burr from the beginning and had several funny moments in his debut episode, he wasn't taken seriously at all. Come "The Believer", he's given a rather sympathetic backstory and a Hidden Heart of Gold that makes him lash out at the Imperial soldiers callously dismissing the deaths of entire platoons, including Mayfeld's own, and destroy their base of operations out of good intentions. Needless to say, he earned himself a slew of new fans after the episode aired.
• The nameless Twi'lek slave girl liberated by Fennec has gotten some popularity, for obvious reasons.
• Koska Reeves and Axe Woves for serving as Bo-Katan's badass entourage, also helped that the former is a trained WWE fighter and the latter is familiar to Marvel fans as another Agents of S.H.I.E.L.D. actor. Koska Reeves gets bonus points from many fans for the fact that her very first action was to save the beloved Grogu’s life, which her actress Sasha Banks even guessed would make Koska popular to the fans in interviews.

---