Lao Beifong's bussines partner and Satoru's uncle.
- Corrupt Corporate Executive: He is running a hidden iron mine underneath the legit crystal one. Even without the possibility of ticking off a powerful spirit, it's polluting the river and could potentially collapse the entire town.
- Evil Uncle: He verbally abuses Satoru.
- Fat Bastard: He is verbally abusive towards his nephew Satoru and doesn't give a crap about his workers' safety, to the point of running an unstable iron mine behind his business partner's back.
- HeelFace Turn: After Satoru saves him.
- Laser-Guided Karma: He runs a unstable mine of iron, ignoring the security problem and even stopping Lao when the latter tries to get the workers evacuated. In the end of Part Two he is trapped inside the collapsed mine.
- Pet the Dog: He gave Satoru a home, food and a job after he ran away from his parents.
The current supervisor of a joint Fire Nation and Earth Kingdom mining operation.
- Adorkable: A Twilight Sparkle-level fanboy of the Gaang, especially Toph.
- Satoru has invented an assembly line process based entirely on machines that non-benders can use, clearly the beginning of the more mechanized world seen in Korra. At the end of Part Three, the Cabbage Merchant, who will go on to found an automobile company, expresses interest in his forklift.
- His name also has a suspiciously similar resemblance to Asami and Hiroshi Sato, making him a possible ancestor. His Hold Your Hippogriffs Catchphrase is even "Flying Fire Ferrets!"
- Extreme Doormat: To his Uncle and pretty much everyone else.
- Freudian Slip: Toph to Satoru, and lampshaded by Katara and Sokka right away:Toph: I would love to be in a partnership with you—I mean, the refinery.
Sokka: Is it just me, or is there some serious oogie-osity going on over there?
Katara: I think it's sweet. We almost never get to see Toph's softer side.
- Implausible Deniability: Satoru insists that the river pollution is from natural causes and not the fault of the factory. Toph confirms that he's telling the truth, or at least thinks he is.
- The Runaway: Like Toph, he ran away from home, because like Mai, his parents are Ozai loyalists.
- Ship Sinking: Given the Ship Tease with Toph and his wavy hair, fans suspected he was the father of Toph's daughter Lin from the Sequel Series, The Legend of Korra. However, in the episode "Operation Beifong" Toph names Lin's father as being some unknown guy called "Kanto", though the door's still open for Satoru to potentially be Suyin's father with the information that Lin and Suyin are only maternal half-sisters.
- Ship Tease: Toph quickly gets a crush on him, but their relationship is soured as Toph's family issues come to the fore, and she accuses him of "acting like a sniveling flunky" to his uncle (her father's business partner).
A pair of sisters from the Southern Water Tribe who were friends with Katara and Sokka before the two left with Aang. Katara meets the two as they are working at Loban's refinery.
- Colour-Coded for Your Convenience: Both wear blue scarves with their gray uniforms, identifying them as Water Tribesmen.
- Death Glare: Nutha's introduction is giving Katara a none-too-friendly stare before yelling at Niyok to return to her side.
- Fallen-on-Hard-Times Job: The sisters had to leave the Southern Water Tribe and work in a dangerous mine just to eat.
- Green-Eyed Monster: Nutha seems to be envious of Katara's globetrotting.
- Perpetual Frowner: Nutha.
- Remember the New Guy?: Katara greets the two as old close friends.
- Sibling Yin-Yang: Niyok is cheerful and friendly, while Nutha is aloof and barely repressing her anger towards Katara and Sokka.
- Youthful Freckles: Nutha.
The Rough Rhinos
An elite mercenary group of Fire Nation cavalry that worked for Fire Lord Ozai during the war. After the war they joined the Earthern Fire Refinery to act as security detail.
- Alliterative Name: The Rough Rhinos
- Bounty Hunter: They work on a freelance basis so they're not above going after Zuko and Iroh for the bounties on their heads.
- Former Regime Personnel: Even after the war, they are still loyal to Fire Lord Ozai despite working for the Earthen Fire Refinery. They are still angry at the Avatar for defeating Fire Lord Ozai, which put them out of a job for a while.
- Hazy Feel Turn: In the comics, where they act as security detail for the Earthen Fire Refinery, but haven't changed morally.
- Horse of a Different Color: They're named after the komodo rhinos they ride into battle.
- Hidden Depths: If what Iroh says about them being a capable singing group is correct. Mongke even says that they're not there to give a performance.
- Jerkass: During and after the war, Mongke is not a pleasant person to be around.
- Private Military Contractors: They're freelancers working for Fire Lord Ozai during the Hundred Years War, but afterwards they became security detail for the Earthen Fire Refinery.
- The Voiceless: Only Mongke speaks. Later averted in The Rift.
- Chain Pain: Uses bolas on chains.
A hapless cabbage merchant whose produce keeps getting inadvertently destroyed by the Gaang. Needless to say, he's not too fond of them.
- Butt-Monkey/Chew Toy: Poor guy just wants to sell some cabbages.
- Disproportionate Retribution: While he understandably hates the Gaang, he's a little overzealous about it. Like that time he thought they were going to be executed:"Off with their heads! One for every head of cabbage!"
- This was the first time they had destroyed his cabbages, too.
- Fruit Cart: The owner of one, which always gets knocked over.
- No Name Given: His name is never revealed, not even in supplementary material.
- Properly Paranoid: He automatically assumes the Avatar will damage his property in some manner, and the Avatar never disappoints.
- Recurring Extra: Lampshaded in "The Ember Island Players" when the list of sources for the play mentions, "a surprisingly knowledgeable merchant of cabbage."
- Screw This, I'm Outta Here!: In his last appearance, he goes, "My Cabb...oh, forget it!"
- Throw the Dog a Bone:
- Didn't meet up with the Gaang at all during the final season, and even worked as a consultant for an anti-Avatar play.
- He returns in the comic sequel "The Rift" and it shows how his passion for technology started.
- The Legend of Korra reveals that he and his family go on to build a large corporation that makes automobiles, among other things.
- Yank the Dog's Chain:
- Said corporation is shut down after it is wrongfully accused of providing the Equalists with weaponry. Even after death, the poor guy just can't catch a break. Well after that, his company is back and running.
- And then we learn that Cabbage Corp's products are pretty much crap compared to the things put out by their rivals at Future Industries. However, the poor quality of their products is partially the CEO's fault due to him focusing on making more money and putting too much emphasis on "cheap" alternatives.