History EnsembleDarkHorse / SouthPark

* [[HookerWithAHeartOfGold Classi]] who appears only in a few scenes, but steals the show by [[KickTheSonOfABitch wailing on Nathan]] and later helping Jimmy [[spoiler: take down the ads]].

* Kyle's kids in the fixed timeline. They only briefly appear in the end to show Kyle has children and their only lines are "Uncle Stan", but despite that they are quite popular if because of how adorable they are and speculation on who Kyle's wife might be.

* Heather Williams has become quite popular, probably because like Cartman's daughter she is voiced by Trey Parker's daughter. She definitely popular enough to make a recurring appearance in Season 25.

* "Craig and those guys", a sometimes friendly sometimes rival gang to the main characters, usually considered by the fandom to consist of [[DeadpanSnarker Craig Tucker]], [[DirtyKid Clyde Donovan]], [[TokenMinority Token Black]], [[PorkyPigPronunciation Jimmy Valmer]], and [[NervousWreck Tweek Tweak]]. Their popularity rivals the Main Four plus Butters easily. One of the most commonly wished things for the show is to get an episode revolving around their group dynamics.
** Additionally, Craig and Tweek both had a surge in popularity when they started dating, instantly becoming one of the show’s most popular couples.

%%[AC:Season 2]]

[[AC:WesternAnimation/SouthParkBiggerLongerAndUncut]]
* Ze Mole's only appearance in the entire series (aside from an extremely brief one second cameo in "Two Guys Naked in a Hot Tub", where he's seen on Late Night with Conan O'Brien) is in the movie. He appears for roughly 15 minutes in the movie. He is by far one of the most popular subjects in South Park fan-fiction and fan-art.
%%* Gregory

[[AC:Season 4]]
* Timmy for being a handicapped kid who despite only being able to say his name isn't treated differently by his classmates or other characters. What also boosts his popularity is more emotional depths in some episodes.

%%[[AC:Season 5]]

[[AC:Season 6]]
* Butter's 'evil' alter-ego [[HarmlessVillain Professor Chaos]] is rather popular, because how ineffectual and hilarious he is at being a villain.

* Thomas from "[[Recap/SouthParkS11E8LePetitTourette Le Petit Tourette]]" is loved for being a sympathetic and realistic portrayal of Tourette's Syndrome. It doesn't hurt that the end of the episode hints at him becoming friends with fellow darkhorse Craig.

%%[[AC:Season 12]]

* Mysterion became one almost the moment he showed up. Even after being revealed as Kenny[[note]]and thus subverting the trope since Kenny is a main character[[/note]], he's STILL one of the most talked about characters. In fact, Mysterion, before he was revealed, was such a major thing, that the South Park creators put out a ''Who Is Mysterion?'' t-shirt.

%%[[AC:Season 16]]

* [[UncannyValleyGirl Leslie Meyers]] due to being a RunningGag character that PC Principal calls out on during school assemblies. She manages to get even ''more'' popular with the revelation that [[spoiler:she's the BigBad of Season 19, and proves to be a very effective antagonist without having to resort to shock humor]]. There are many fan art with Leslie, with many fans shipping her with either Jimmy and/or Kyle. Despite [[spoiler:dying]], many fans hope that she can return somehow in later seasons.

* Kyle's kids in the fixed timeline. They only briefly appear in the end to show Kyle has children and their only lines are "Uncle Stan", but despite that they are quite popular if because of how adorable they are and speculation on who Kyle's wife might be.

* Annie Knitts saw a notable rise in popularity following her appearance in ''The Stick of Truth''. Primarily because she's often shipped with fellow darkhorse, [[PlayerCharacter the New Kid]].

* Kyle's kids in the fixed timeline. They only briefly appear in the end to show Kyle has children and their only lines are "Uncle Stan", but despite that they are quite popular if only because it leads to speculation on who Kyle's wife might be and how adorable Kyle's kids are.

[[AC:WesternAnimation/SouthParkPostCovidReturnOfCovid]]
* Kyle's kids in the fixed timeline. They only briefly appear in the end to show Kyle has children and their only lines are "Uncle Stan", but despite that they are quite popular if only because it leads to speculation on who [[FringeBrilliance Kyle's wife might be]] and how adorable Kyle's kids are.

* The diabetic Scott Malkinson has also gained a decent following, possibly attributing to his more frequent appearances in recent seasons, but he gained even more popularity as his superhero alter-ego "Captain Diabetes".

* [[UncannyValleyGirl Leslie Meyers]] due to being a RunningGag character that PC Principal calls out on during school assemblies. she manages to get even ''more'' popular with the revelation that she's the BigBad of Season 19 and proves to be a very effective antagonist without having to resort to shock humor. There are many fan art with Leslie, with many fans shipping her with either Jimmy and/or Kyle, and are hoping that she returns from the dead and given more prominence and depth to her character in future seasons.

!!''WesternAnimation/SouthPark''

* The tertiary classmates can have their own fan followings, such as Kevin Stoley (the ''Star Wars''-loving kid) and [[http://southpark.wikia.com/wiki/DogPoo_Petuski Dog Poo]].

* Randy Marsh: Once intended to be the rather background parent of Stan but due to his behaviour and nonsensical antics he has taken the Spotlight together with the Main Characters.

%%[[AC:Season 10]]

* The New Kid, [[PlayerCharacter naturally]].