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* DemotedToExtra: In season 22, Heidi returned to her old role as a background character.
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* TookALevelInBadass: [[spoiler: As of "Splatty Tomato" she has abanbons the victim-mindhoodset and no longer has any problems dumping Cartman, showing how strong she really is.]]
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* TookALevelInBadass: [[spoiler: As of "Splatty Tomato" she has abanbons the victim-mindhoodset and no longer has any problems dumping Cartman, showing how strong she really is.has become.]]
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** She also may be one to a female [[VideoGame/SouthParkTheFracturedButWhole New Kid]], in regards to their contrasting relationships with Cartman. While Heidi's relationship with him is romantic, the New Kid has more of a teacher/student bond with him. Heidi came to Cartman and the two bonded over falling off the social media grid while Cartman [[BecauseYouWereNiceToMe went out of his way to be nice to the New Kid and thus earned her loyalty]]. [[spoiler: And while Heidi broke up with Cartman after realizing what his influence turned her into, The New Kid had no problems with anything Cartman was having her do, until Cartman betrayed her and kidnapped her parents, which caused her to lose all respect for him.]]
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** She She's also may be one to a female [[VideoGame/SouthParkTheFracturedButWhole New Kid]], in regards to their contrasting relationships with Cartman. While Heidi's relationship with him is romantic, the New Kid has more of a teacher/student bond with him. Heidi came to Cartman and the two bonded over falling off the social media grid while Cartman [[BecauseYouWereNiceToMe went out of his way to be nice to the New Kid and thus earned her loyalty]]. [[spoiler: And while Heidi broke up with Cartman after realizing what his influence turned her into, The New Kid had no problems with anything Cartman was having her do, until Cartman betrayed her and kidnapped her parents, which caused her to lose all respect for him.]]
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** She also may be considered one to a female [[VideoGame/SouthParkTheFracturedButWhole New Kid]], at least in regards to their contrasting relationships with Cartman. While Heidi's relationship with him is romantic, the New Kid has more of a teacher/student bond with him. Heidi came to Cartman and the two bonded over falling off the social media grid while Cartman [[BecauseYouWereNiceToMe went out of his way to be nice to the New Kid and thus earned her loyalty]]. [[spoiler: And while Heidi broke up with Cartman after realizing what his influence turned her into, The New Kid had no problems with anything Cartman was having her do, until Cartman betrayed her and kidnapped her parents, which caused her to lose all respect for him.]]
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** She also may be considered one to a female [[VideoGame/SouthParkTheFracturedButWhole New Kid]], at least in regards to their contrasting relationships with Cartman. While Heidi's relationship with him is romantic, the New Kid has more of a teacher/student bond with him. Heidi came to Cartman and the two bonded over falling off the social media grid while Cartman [[BecauseYouWereNiceToMe went out of his way to be nice to the New Kid and thus earned her loyalty]]. [[spoiler: And while Heidi broke up with Cartman after realizing what his influence turned her into, The New Kid had no problems with anything Cartman was having her do, until Cartman betrayed her and kidnapped her parents, which caused her to lose all respect for him.]]
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** She also one for Butters Stotch. Both are one of the few to exemplify that ChildrenAreInnocence, whose naivety are constantly exploited by Cartman and are among the few kids to call him Eric. However Butters' naivety is usual portrayed as in positive light, and still keeps his innocence despite constant manipulation, while Heidi naivety is viewed as a negative aspect of her personality, and as a result looses her innocence and becomes Cartman's DistaffCounterpart.
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** She also one for Butters Stotch. Both are one of the few to exemplify that ChildrenAreInnocence, kind and innocent children, whose naivety are constantly exploited by Cartman and are among the few kids to call him Eric. However Butters' naivety is usual portrayed as in positive light, and still keeps his innocence despite constant manipulation, while Heidi naivety is viewed as a negative aspect of her personality, and as a result looses her innocence and becomes Cartman's DistaffCounterpart.
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* DeconstructedCharacterArchetype: Of the ButtMonkey trope, basically showing how much of her sanity gets chipped away as a result of being everyones punching bag, eventually snapping and adopting most her boyfriend's worst qualities.
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** She also one for Butters Stotch. Both are one of the few to exemplify that ChildrenAreInnocence, whose naivety are constantly exploited by Cartman and are among the few kids to call him Eric. However Butters' naivety is usual portrayed as in positive light, and still keeps his innocence despite constant manipulation, while Heidi naivety is viewed as a negative aspect of her personality, and as a result looses her innocence and becomes Cartman's DistaffCounterpart.
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* BrainyBrunette: She has brown hair, and is quite smart for someone her age, having been described by Mr. Mackey as their best science student
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* BrainyBrunette: She has brown hair, and is quite smart for someone her age, having found a ways to travel to Mars and is been described by Mr. Mackey as their best science studentstudent.
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* BrainyBrunette: She has brown hair, and is quite smart for someone her age, having been described by Mr. Mackey as their best science student
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* {{Deuteragonist}}: Of seasons 20 and 21. Her relationship with Cartman is the focal point for both those seasons and her importance is second only to that of her boyfriend.
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* {{Deuteragonist}}: Of seasons 20 and 21. Her relationship with Cartman is the biggest focal point for both those seasons and her importance is second only to her boyfriend Cartman.
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* {{Deuteragonist}}: Of seasons 20 and 21. Her relationship with Cartman is the biggest focal point for both those seasons and her importance is second only to her boyfriend Cartman.
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* {{Tritagonist}}: Of seasons 20 and 21 where her character arc drives the plot for both those seasons and only Kyle and Cartman are above her in terms of importance.
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* ClassicalAntiHero: While Heidi is a genuinely kind and thoughtful girl, she also has numerous flaws such as naivety, insecurity, and {{Pride}} that allowed her to be manipulated by a lot of people, like Cartman. [[spoiler: In "Splatty Tomato" Heidi learns to overcome it realizing she can't rely on other people to make choices for her, and must learn to make her own decisions, leading to her choice to finally break up with Cartman.]]
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* ClassicalAntiHero: While Heidi is a genuinely kind and thoughtful girl, she also has numerous flaws such as naivety, insecurity, and {{Pride}} that allowed her to be manipulated by a lot of people, like Cartman. [[spoiler: In "Splatty Tomato" Heidi learns starts to overcome it this upon realizing she can't rely on other people to make choices for her, and must learn to make her own decisions, leading to her choice to finally break up with Cartman.]]
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Changed line(s) 31 (click to see context) from:
* ClassicalAntiHero: While Heidi is a genuinely kind and thoughtful girl, she also has numerous flaws such as naivety, insecurity, and {{Pride}} that her to be manipulated by a lot of people, like Cartman. [[spoiler: In "Splatty Tomato" Heidi learns to overcome it realizing she can't rely on other people to make choices for her, and must learn to make her own decisions, leading to her choice to finally break up with Cartman.]]
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* ClassicalAntiHero: While Heidi is a genuinely kind and thoughtful girl, she also has numerous flaws such as naivety, insecurity, and {{Pride}} that allowed her to be manipulated by a lot of people, like Cartman. [[spoiler: In "Splatty Tomato" Heidi learns to overcome it realizing she can't rely on other people to make choices for her, and must learn to make her own decisions, leading to her choice to finally break up with Cartman.]]
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* ClassicalAntiHero: While Heidi is a genuinely kind and thoughtful girl, she also has numerous flaws such as naivety, insecurity, and {{Pride}} that her to be manipulated by a lot of people, like Cartman. [[spoiler: However In "Splatty Tomato" Heidi learns to slightly overcome it realizing she can't rely on other people to make choices for her, and must learn to make her own decisions, leading to her choice to finally break up with Cartman.]]
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* ClassicalAntiHero: While Heidi is a genuinely kind and thoughtful girl, she also has numerous flaws such as naivety, insecurity, and {{Pride}} that her to be manipulated by a lot of people, like Cartman. [[spoiler: However In "Splatty Tomato" Heidi learns to slightly overcome it realizing she can't rely on other people to make choices for her, and must learn to make her own decisions, leading to her choice to finally break up with Cartman.]]
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* GoodCounterpart: She becomes this for Eric Cartman. Like Cartman, she was an [[FatBastard Fat]] {{Jerkass}} who would use her role as the victim as a way to justify being awful. Unlike him however, Heidi learns how unhealthy this way of thinking is, and is capable of taking responsibility for her actions.
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* GoodCounterpart: She becomes this for Eric Cartman. Like Cartman, she was an [[FatBastard Fat]] {{Jerkass}} who would use her role as the victim as a way to justify being awful. Unlike him however, Heidi learns how unhealthy this way of thinking is, and is capable of taking responsibility for her own actions.
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* ClassicalAntiHero: While Heidi is a genuinely kind and thoughtful girl, she also has numerous flaws such as naivety, insecurity, and {{Pride}} that her to be manipulated by a lot of people, like Cartman. [[spoiler: However In "Splatty Tomato" Heidi learns to slightly overcome it realizing she can't rely on other people to make choices for her, and must learn to make her own decisions, leading to her choice to finally break up with Cartman.]]
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* GoodCounterpart: She becomes this for Eric Cartman. Like Cartman, she was an [[FatBastard Fat]] {{Jerkass}} who would use her role as the victim as a way to justify being awful. Unlike him however, Heidi learns how unhealthy this way of thinking is, and actually is capable of making changes to better herself.
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* GoodCounterpart: She becomes this for Eric Cartman. Like Cartman, she was an [[FatBastard Fat]] {{Jerkass}} who would use her role as the victim as a way to justify being awful. Unlike him however, Heidi learns how unhealthy this way of thinking is, and actually is capable of making changes to better herself.taking responsibility for her actions.
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* HonorThyAbuser: In "Doubling Down" Heidi decide to accept Cartman's abuse and begins to adopt his personality, which leads to her transformation into his DistaffCounterpart. [[spoiler: Subverted in "Splatty Tomato" when she learns that its ''not'' okay to accept the abuse and adopting said abuser's personality, leading to her decision to dump Cartman.]]
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* HonorThyAbuser: In "Doubling Down" Heidi decide to accept Cartman's abuse and begins to adopt his personality, which leads to her transformation into his DistaffCounterpart. [[spoiler: Subverted in "Splatty Tomato" when she learns that its ''not'' okay to accept the abuse and adopting said abuser's personality, leading to her decision to dump Cartman.her abuser.]]
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* HonorThyAbuser: In "Doubling Down" Heidi decide to accept Cartman's abuse and begins to adopt his personality, which leads to her transformation into his DistaffCounterpart. [[spoiler: Subverted in "Splatty Tomato" when she learns that its ''not'' okay to accept the abuse and adopting said abuser's personality, leading to her decision to dump with Cartman.]]
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* HonorThyAbuser: In "Doubling Down" Heidi decide to accept Cartman's abuse and begins to adopt his personality, which leads to her transformation into his DistaffCounterpart. [[spoiler: Subverted in "Splatty Tomato" when she learns that its ''not'' okay to accept the abuse and adopting said abuser's personality, leading to her decision to dump with Cartman.]]
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HonorThyAbuser: In "Doubling Down" Heidi decide to accept Cartman's abuse and begins to adopt his personality, which leads to her transformation into his DistaffCounterpart. [[spoiler: Subverted in "Splatty Tomato" when she learns that it ''isn't'' okay to accept being abused and adopting said abuser's personality, leading to her decision to dump with Cartman.]]
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* HonorThyAbuser: In "Doubling Down" Heidi decide to accept Cartman's abuse and begins to adopt his personality, which leads to her transformation into his DistaffCounterpart. [[spoiler: Subverted in "Splatty Tomato" when she learns that it ''isn't'' its ''not'' okay to accept being abused the abuse and adopting said abuser's personality, leading to her decision to dump with Cartman.]]
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HonorThyAbuser: In "Doubling Down" Heidi decide to accept Cartman's abuse and begins to adopt his personality, which leads to her transformation into his DistaffCounterpart. [[spoiler: Subverted in "Splatty Tomato" when she learns that it ''isn't'' okay to accept being abused and adopting said abuser's personality, leading to her decision to dump with Cartman.]]
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* TookALevelInBadass: [[spoiler: As of "Splatty Tomato" she has abanbons the victim-mindhoodset and no longer has any problems dumping Cartman, showing how strong she really is or has become.]]
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* TookALevelInBadass: [[spoiler: As of "Splatty Tomato" she has abanbons the victim-mindhoodset and no longer has any problems dumping Cartman, showing how strong she really is or has become.is.]]
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* TheSmurfettePrinciple: She is the only female character to appear in the Season 21 DVD box cover.
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* TheSmurfettePrinciple: She is the only female character to ever appear in the Season 21 a DVD box cover.
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A girl in the class as the four boys who becomes Eric Cartman's girlfriend for a while.
Originally just one of the minor female classmates and a part of Wendy and Bebe's group of friends, she became a much more prominent character Season 20 onwards.
Originally just one of the minor female classmates and a part of Wendy and Bebe's group of friends, she became a much more prominent character Season 20 onwards.
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A girl in the same class as the four boys who attend. She becomes Eric Cartman's girlfriend for a while.
while. Originally just one of the minor female classmates and a part of Wendy and Bebe's group of friends, she became a much more prominent character Season 20 onwards.
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Composite Character is an adaptation trope. It doesn't count just because a character has traits that make him/her similar to other characters.
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* CompositeCharacter: Take Wendy Testaburger status as a 4th grade girl who wears a hat, is very smart, and had a crush on Cartman, give her elements of Liane Cartman's submissive nature and Butter's naïvety, and by "Moss Piglets" give her Cartman's obesity, {{Jerkass}} personality, and racism, and that's how you get Heidi Turner.
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* CompositeCharacter: Take Wendy Testaburger status as a 4th grade girl who wears a hat, is very smart, and had a crush on Cartman, give her elements of Liane Cartman's submissive nature and Butter's naïvety, and by "Moss Piglets" give her Cartman's obesity, {{Jerkass}} personality, and racism, and that's how you get Heidi Turner.
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* {{Tritagonist}}: Of seasons 20 and 21 where her character arc drives the plot for both those seasons and only Kyle and Cartman are above her in terms of importance.
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* BreakoutCharacter: Originally just one of the more minor characters, becoming Cartman's girlfriend has made her extremely popular amongst the fanbase, promoting her status to a major character even obtaining a hat of her own.
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A girl in same 4th grade class as the four boy who became Eric Cartman's girlfriend for a while.
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A girl in same 4th grade the class as the four boy boys who became becomes Eric Cartman's girlfriend for a while.
while.
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A girl in same 4th grade class as the four boy who became Eric Cartman's girlfriend for a while. She was originally one of the minor female classmates and a part of Wendy and Bebe's group of friends, but became a much more prominent character Season 20 onwards.
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A girl in same 4th grade class as the four boy who became Eric Cartman's girlfriend for a while. She was originally
Originally just one of the minor female classmates and a part of Wendy and Bebe's group of friends,but she became a much more prominent character Season 20 onwards.
Originally just one of the minor female classmates and a part of Wendy and Bebe's group of friends,
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!!Heidi Turner
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!Heidi Turner
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Felt that Heidi needed her own page since she had a lot more tropes than the other students, even Wendy.
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!!Heidi Turner
[[quoteright:285:https://static.tvtropes.org/pmwiki/pub/images/hatheidi_8.png]]
[[caption-width-right:285:Heidi as of Season 20.[[note]]Prior to "Skank Hunt", she did not wear a hat.[[/note]]]]
-> "''Eric!, Hey, I got us chocolate milks!''"
->'''Voiced by:''' Jessica Makinson
->'''Debut:''' "[[Recap/SouthParkS3E1RainforestSchmainforest Rainforest Shmainforest]]"
A girl in same 4th grade class as the four boy who became Eric Cartman's girlfriend for a while. She was originally one of the minor female classmates and a part of Wendy and Bebe's group of friends, but became a much more prominent character Season 20 onwards.
----
[[foldercontrol]]
[[folder:A-M]]
* AscendedExtra: Has been around ever since Season 3, but was mostly a background character. However, as the series progressed, she got a fair amount of prominence and speaking roles. In fact, she played a fairly big role in the Season 9 episode "Marjorine". Despite this, however, her personality and limelight had not been fully established until Season 20.
* ADayInTheLimelight: "The Damned" gives her much more focus than almost every other episode in the series combined. In general, Season 20 is this for her; she contributes to the storyline and is important to half of the main cast, especially Cartman, her boyfriend. Not bad for somebody who was lucky to have anything resembling a role aside from being a minor character for 17 years.
* AwesomenessByAnalysis: In Season 20, she is shown to have invented an entire method of cryptographic analysis in order to uncover the identity of [=skankhunt42=]. Not bad for [[ChildProdigy a ten-year-old]]. Taken UpToEleven when dealing with the issues at [=SpaceX=]; she manages to create a source of energy that can power humanity's trip to Mars, and later saves the world from [=TrollTrace=] by having done so.
* BaitAndSwitch: In "Skank Hunt", she looks suicidal when she's shown at the edge of a bridge, but she was really just quitting Twitter and throwing her phone into the river.
* BreakTheCutie: Season 21 has definitely done this to her. She gets constantly mocked by the other girls for having Cartman as her boyfriend, said boyfriend constantly emotionally abuses her, and manipulates her into rejecting the only person (Kyle) who showed her any sympathy this season. It was inevitable that she would go from a NiceGirl to a GenderFlipped version of her boyfriend.
* BrokenBird: She becomes one by season 21. She failed to stop [=Skankhunt42=] last season, is frequently picked on by the other girls, and is stuck in an emotionally abusive relationship with Cartman. She tries to cope with all of this by becoming a female version of her boyfriend, only to realize how much she has changed from the NiceGirl she was before. Because of this she [[spoiler:breaks up with Cartman for good]].
* BrokenHero: Despite getting viciously trolled, shunned by her friends, and mentally abused by Cartman, she still tries her see the best in everyone and goes out of her way to help those in need. That said, she does have her breaking point and becomes Cartman's DistaffCounterpart because of the constant all of the above.
* BroodingBoyGentleGirl: Was the Gentle Girl to Cartman's Brooding Boy.
* CharacterDevelopment: Goes from a judgmental BitchInSheepsClothing first shown in "Marjorine" to a humble NiceGirl after quitting twitter and hooking up with Cartman. However, her self-esteem has also drastically decreased making her submissive to Cartman's abuse. This eventually causes her to adopt Cartman's personality making her nastier than she ever was before. However, she learns how much Cartman's influence changed her, which makes her come to her senses and give her the courage to stand up to Cartman, not cull to his demands, and [[spoiler: break up with him for good.]]
* CharacterizationMarchesOn:
** Was shown to be a BitchInSheepsClothing who picked on the "new girl"[[note]]whom was really Butters DisguisedInDrag[[/note]] in "Marjorine" and ridiculed Lisa Berger for her insecurity in "The Hobbit", but as the show entered its 20th season she has been shown to be nicer.
** She was shown with numerous different parents throughout the series. Even after her properly renamed introduction in "Marjorine" where her parents are revealed, she was still shown with different parents in "Cartoon Wars Part II", "La Petit Tourette", and "Medicinal Fried Chicken".
** In "Follow That Egg!", she hates Cartman as much as everyone else, and is upset about being paired with him on the egg project.
* CharlesAtlasSuperpower: Emoji Analysis lets her see meaningful patterns in absolutely anything, even things she does not understand (such as [[spoiler:the engineering problems that need to be overcome in order to reach Mars), to the point of being able to correct the equations herself]], by replacing what is to her meaningless data with something else, which lets her know that [[spoiler:two lines in the equations are misaligned]], and even lets her produce the season's DeusExMachina.
* CoordinatedClothes: In Season 20, she was always shown wearing matching clothes when she was with her boyfriend Cartman.
* TheCorruptible: As of "Doubling Down", Cartman starts slowly turning her into a female version of himself, tricking her into eating unhealthy foods to make her fatter and convincing her that Kyle (and Jews in general) are terrible people (after Kyle nearly convinced her to leave Cartman). [[spoiler: Thankfully she learns how listening to Cartman has negatively changed her health so decides not to believe his lies after breaking up with him for good.]]
* DefrostingIceQueen: While earlier episodes such as "Follow That Egg!" shown Heidi contemptuous of Cartman, when she becomes promoted to main cast starting in Season 20 and starts dating him, she treats him very kindly. By season 21, Cartman got irritated by how overly affectionate Heidi is towards him and ends up turing her into a female version of him.
* DistaffCounterpart: By episode 8 of Season 21, she's essentially become a female Cartman, becoming obese and adopting all his prejudices, selfishness, and casual cruelty. [[spoiler: It becomes one of the reasons why she broke up with Cartman in "Splatty Tomato".]]
* TheDogBitesBack: Cartman is an asshole who brainwashed her into becoming his DistaffCounterpart. That said, he learns the hard way what the rest of the protagonists have to deal with, and it's obvious she becomes the one who wears the pants in their relationship.
* EarlyInstallmentCharacterDesignDifference: Used to have black hair, rather than light brown, and flip-flopped between the colors for a while.
* EvilVegetarian: Not as first, but she still claims to be a vegan after her TookALevelInJerkass. Subverted because Cartman tricked her into eating meat.
* FallenHeroine: Originally one of the kindest characters in South Park and one of the leading heroes in Season 20, by the next season Cartman's influence has turned her into his DistaffCounterpart turning all her kindness into complete jerkassery. [[HeelRealization She eventually realizes how far she has fallen]], when Kyle declares he could ''never'' have any feelings for the person she has become.
* FatBitch: Due to Cartman's influence, she becomes both obese and a terrible person by "Moss Piglets". [[spoiler: this [[HeelRealization changes]] in "Splatty Tomato".]]
* FormerlyFit: She used to be healthy eating a vegan diet. However Cartman tricked her into eating "Beyond" KFC and "Beyond" Arbys and she has become nearly as fat as him.
* FreudianExcuseIsNoExcuse: What Heidi learns at the end of "Splatty Tomato". Even though she suffered a mentally abusive relationship with Eric Cartman, it doesn't mean she can become a horrible person. She decides to end this problem once and for all [[spoiler: by breaking up with Cartman for good.]]
* TheFriendsWhoNeverHang: After hooking up with Cartman, she all of the sudden stopped hanging out with the girls and is almost only shown with her boyfriend now. This is probably explanatory though, since she didn't want to get involved with the drama of the gender war that her friends was participating in, and instead wanted to put an end to it alongside Cartman (who felt the same way about said gender war).
* GoodCounterpart: She becomes this for Eric Cartman. Like Cartman, she was an [[FatBastard Fat]] {{Jerkass}} who would use her role as the victim as a way to justify being awful. Unlike him however, Heidi learns how unhealthy this way of thinking is, and actually is capable of making changes to better herself.
* GrewASpine: After dealing with Cartman's abuse throughout Season 21 and being converted into his DistaffCounterpart, Heidi finally grows her own in "Splatty Tomato" when she [[spoiler: makes it clear that they are breaking up for good, even ignoring his suicide threats that originally kept her from leaving.]]
* HeelFaceRevolvingDoor: Has a tendency to switch from a NiceGirl to a {{Jerkass}}. She had made her debut in "Rainforest Shmainforest" but wasn't given much characterization making her neutral on the moral spectrum. Then she was given her first major appearance in "Marjorine" where she shows herself to be quite an AlphaBitch amongst her friends making her a Heel which lasted until "Skank Hunt" which gives her [[AscendedExtra more prominence]] and [[TookALevelInKindness becomes much nicer]]. Then after [[OfficialCouple becoming Cartman's girlfriend]] and [[ToxicFriendInfluence letting his influence turn her]] into his DistaffCounterpart she becomes a Heel once more in "Moss Piglets" which lasts until "Splatty Tomato" where she gets a HeelRealization and [[spoiler: breaks up with Cartman for good]] making her a Face again.
* HeelRealization: After Kyle declares he can never love her current self in season 21's finale, Heidi begins to look back on how she got to the point of being a female Cartman, realizing how he slowly destroyed her mentally and physically including attempts of murder. Heidi has enough [[spoiler: and breaks up with Cartman for good, no longer wishing to be the victim.]]
* HisOwnWorstEnemy: Ultimately, the biggest reason why Heidi becomes a [[DistaffCounterpart female Cartman]] isn't actually Cartman but is instead her own {{Pride}}. She doesn't want to admit that she made a bad decision dating Cartman, and when her friends mocks her about that matter she chooses to back to Cartman and believe his lies. She [[HeelRealization eventually realizes]] that it was her own fault that she deteriorated so much, both physically and mentally, and decides to make the logical decision to [[spoiler: break up with Cartman for good.]]
* HonorBeforeReason: Kyle eventually realizes that the reason she won't break up with Cartman despite the horrible way he treats her is because she doesn't want to have to admit to the other girls that they were right and dating him was a bad idea. When she does, she gets frustrated when the girls go a little too far in [[IToldYouSo teasing Heidi about dating Cartman, which causes her to go back to Cartman and buy his lies]]. Basically she would rather suffer in an abusive and manipulative relationship than swallow her pride and own up to her mistakes. [[spoiler:Thankfully, she does realize how much this way of thinking has changed her, so she decides to finally own up to her mistakes by breaking up with Cartman for good.]]
* HorribleJudgeOfCharacter: Goes with the territory of being Cartman's girlfriend. Though to her credit, Cartman was a genuinely nice boyfriend in the beginning of their relationship. Something she actually points out shortly before [[spoiler:breaking up with him for good]].
* IdiotSavant: PlayedWith. She's certainly not an idiot, despite her seeming lack of social skills, but her skills in Emoji Analysis are nothing short of savantlike.
* IHatePastMe: Throughout "Splatty Tomato" Heidi constantly switches from fondly remembering her more naive and happier self to showing nothing but bitterness and contempt for her.
* InformedAttribute: In-universe example. Her boyfriend Cartman was constantly telling her and everyone else how "smart and funny" she was in Season 20. While she ''is'' shown to be quite smart, she never really says or does anything funny, which she and other characters pointed out.
* InformedFlaw: Wendy says that she has a flat butt in "The Hobbit", but much like the rest of the people she insulted, that feature doesn't seem to apply to her and hasn't been looked into any further.
* InnocentBigot: Thanks to [[TheCorrupter Cartman]], who manages to brainwash her into sharing his anti-Semitism. She still acts sweet and polite to Kyle as she breaks up with him, but he immediately realizes she essentially called him a "dirty Jew." She drops the innocent part by the next episode.
* ItSucksToBeTheChosenOne: Once Cartman convinces everyone that she's their only hope to get to Mars in "Not Funny", she pretty clearly knows that she's been forced into something far beyond her own abilities.
* JerkassRealization: In season 21's finale Heidi realizes how horrible she has become thanks to Cartman's influence on her in the aforementioned season.
* LivingProp: Though not completely silent, Heidi was mostly a background character prior to Season 20.
[[/folder]]
[[folder:N-Z]]
* NiceHat: Gets a stripped one with a flower on it in "Skank Hunt".
* NiceGirl: Going hand-in-hand with her constant attempts to help people on a large scale, there doesn't seem to be a single person Heidi dislikes. Even Cartman. ''[[OfficialCouple Especially]]'' [[SickeninglySweethearts Cartman]]. Unfortunately after "Moss Piglets", she has [[TookALevelInJerkass changed]].
* NotAfraidOfYouAnymore: In contrast to previously taking Cartman back when threatens to kill himself in "Put It Down", she firmly states thats not going to work and leaves when Cartman pull this stunt again in "Splatty Tomato" making it clear to him [[spoiler: that this time they are breaking up for good.]]
* OddFriendship: Develops one with Cartman after they both go off Twitter, which eventually evolves into a relationship.
* OfficialCouple: With ''Eric Cartman'', of all people. [[spoiler: However the relationship ends in “Splatty Tomato” when she breaks up with Cartman for good.]]
* PingPongNaivete: Is smart enough to figure out how to uncover anybody's identity online, and create the energy source required to go to Mars, but doesn't know that [[LessDisturbingInContext showing her private parts to a boy she barely knows]] is inappropriate behavior. These events happen in the same season.
* PoliticallyIncorrectVillain: She starts spewing ableist and classist rhetoric in "Moss Piglets".
* {{Pride}}: The reason why she doesn't want to break up with Cartman, even if she knows he's a bad influence for her.[[spoiler: Eventually she learns to forgo her pride upon realizing how much it cost her, both physically and mentally, and breaks up with Cartman.]]
* ProtagonistJourneyToVillain: Season 21 gives the most focus to her deteriorating relationship with Cartman and it transformed her from a NiceGirl to his DistaffCounterpart. [[spoiler:Subverted when she gets a HeelRealization and breaks up with Cartman.]]
* RiseOfZitboy: After gaining weight, she now has two pimples on her face, probably caused by all of the grease in the KFC Cartman has been feeding her.
* ShadowArchetype:
** To Wendy Testabuger. Both are very intelligent compared to the other girls, had feelings for Eric Cartman, and are the only known female students to wear hats. However Heidi lack Wendy's strong will and thus never learned to resolve her feelings for Cartman on her own like Wendy did, [[spoiler: needing an ArmorPiercingResponse from Kyle to make her realize how her feelings warped her judgment]]. As a result while Wendy was able to keep her positive attributes, lose all her feelings for Cartman, and retain her self-identity, Heidi loses all her attributes and stayed in a romantic relationship with Cartman long enough for his [[ToxicFriendInfluence toxic influence]] to turn her into a [[DistaffCounterpart female version of himself]].
** She also may be considered one to a female [[VideoGame/SouthParkTheFracturedButWhole New Kid]], at least in regards to their contrasting relationships with Cartman. While Heidi's relationship with him is romantic, the New Kid has more of a teacher/student bond with him. Heidi came to Cartman and the two bonded over falling off the social media grid while Cartman [[BecauseYouWereNiceToMe went out of his way to be nice to the New Kid and thus earned her loyalty]]. [[spoiler: And while Heidi broke up with Cartman after realizing what his influence turned her into, The New Kid had no problems with anything Cartman was having her do, until Cartman betrayed her and kidnapped her parents, which caused her to lose all respect for him.]]
** She also becomes a shadow to her old self. Contrasting the kind, caring, naive, and healthy girl she once was before dating Cartman to the bitter, resentful, bigoted, and fat {{Jerkass}} she became while dating him. "Splatty Tomato" in particular points this out.
* TheSmurfettePrinciple: She is the only female character to appear in the Season 21 DVD box cover.
* SourOutsideSadInside: Sure she's become the GenderFlipped version of her boyfriend Cartman by "Moss Piglets", but that's because she doesn't want to be constantly abused emotionally by her peers and Cartman, even if it means abusing them herself. This is more explored in "Splatty Tomato" where despite acting horrible, she's just so broken.
* StepfordSmiler: She may be all bubbly and happy for most of Season 20, but in "Douche and a Danish" she breaks down crying after her plan to help Denmark turns out to be for nothing, suggesting that she doesn't have very good self-esteem.
* SuddenNameChange: Was originally identified as "Marcy" in "Probably", but was later properly renamed Heidi in "Marjorine".
* TemporarilyAVillain: Her time as a [[DistaffCounterpart female Cartman,]] which started in "Moss Piglets" and lasted until "Splatty Tomato".
* ThenLetMeBeEvil: After being picked on by her friends for going out with Cartman, she decides to let him manipulate her and become his DistaffCounterpart. [[spoiler:She snaps out of it in "Splatty Tomato".]]
* TookALevelInBadass: [[spoiler: As of "Splatty Tomato" she has abanbons the victim-mindhoodset and no longer has any problems dumping Cartman, showing how strong she really is or has become.]]
* TookALevelInKindness: Prior to Season 20, she could be unkind to the point of cruelty. After Season 20, however, she's arguably one of the nicest of the 4th grade girls. However...
* TookALevelInJerkass: By "Moss Piglets" in Season 21, she has become a female version of Cartman. [[{{Subverted}} However,]] it serves more as a [[JerkassFacade defense mechanism]] to endure all the emotional stress given to her rather than becoming genuinely malicious. When she [[HeelRealization realizes]] that [[BecomingTheMask she took it too far]], she decides to resolve this issue [[spoiler: by breaking up with Cartman.]]
* ToxicFriendInfluence: Cartman's influence essentially turns Heidi into a female version of himself. She ends up an obese, racist, and selfish {{Jerkass}} towards everyone. While the transformation was initially intentional on Cartman's part, he quickly realizes how [[GoneHorriblyRight awful it is to be around someone like himself]].[[spoiler: Likewise, Heidi doesn’t like what Cartman’s influence turned her into and breaks up with him for good because of it.]]
* TragicBigot: Originally Heidi was a sweet innocent girl who wanted to put an end to trolling and bring all genders together along with her boyfriend, Eric Cartman, back in Season 20. However her efforts were rendered null when Cartman undermined her attempts because he was afraid that she would leave her if she uncovered his bigoted past. Fast-forward to Season 21 Cartman, who has regressed to his old self, decides to manipulate her into becoming a bigot like him. She lets him manipulates her with his bigoted views after getting back together with him so she would not feel stupid in front of her friends, all of whom have mocked her for ever considering hooking up with him in the first place. She eventually turns into another version of Cartman, becoming fat and highly prejudice towards, Jews, and The handicapped.
* TroubledAbuser: After being abused by Cartman for the majority of Season 21, she starts adopting his personality and began abusing him.
* UnwittingInstigatorOfDoom: When she gave her "Emoji Analysis" to [[PsychopathicManChild Lennart Bedrager]], she didn't know that he'd use it to cause mass hysteria and a world war.
* WhatHaveIBecome: After hearing Kyle's ArmorPiercingResponse in "Splatty Tomato", she becomes disgusted with herself for becoming Cartman's DistaffCounterpart. At first, she blames Cartman and prepares to kill him for, in her own words, "turning me into this!" However, she soon realizes that it was her "I'm a victim" attitude that resulted in her deteriorated state.
* YouExclamation: She gives this to Cartman near the end of "Splatty Tomato".
* YouKilledMyFather: Averted. Her father is killed in "Probably" because of Cartman's [[NoOSHACompliance negligence]], but, as shown in Season 20, she doesn't seem to hold it against him, or even remember it. She is shown with different, living, parents in other episodes. [[WatsonianVersusDoylist Either her mother remarried, or the writers just reused Heidi's character model for generic girls early on]].
[[/folder]]
[[quoteright:285:https://static.tvtropes.org/pmwiki/pub/images/hatheidi_8.png]]
[[caption-width-right:285:Heidi as of Season 20.[[note]]Prior to "Skank Hunt", she did not wear a hat.[[/note]]]]
-> "''Eric!, Hey, I got us chocolate milks!''"
->'''Voiced by:''' Jessica Makinson
->'''Debut:''' "[[Recap/SouthParkS3E1RainforestSchmainforest Rainforest Shmainforest]]"
A girl in same 4th grade class as the four boy who became Eric Cartman's girlfriend for a while. She was originally one of the minor female classmates and a part of Wendy and Bebe's group of friends, but became a much more prominent character Season 20 onwards.
----
[[foldercontrol]]
[[folder:A-M]]
* AscendedExtra: Has been around ever since Season 3, but was mostly a background character. However, as the series progressed, she got a fair amount of prominence and speaking roles. In fact, she played a fairly big role in the Season 9 episode "Marjorine". Despite this, however, her personality and limelight had not been fully established until Season 20.
* ADayInTheLimelight: "The Damned" gives her much more focus than almost every other episode in the series combined. In general, Season 20 is this for her; she contributes to the storyline and is important to half of the main cast, especially Cartman, her boyfriend. Not bad for somebody who was lucky to have anything resembling a role aside from being a minor character for 17 years.
* AwesomenessByAnalysis: In Season 20, she is shown to have invented an entire method of cryptographic analysis in order to uncover the identity of [=skankhunt42=]. Not bad for [[ChildProdigy a ten-year-old]]. Taken UpToEleven when dealing with the issues at [=SpaceX=]; she manages to create a source of energy that can power humanity's trip to Mars, and later saves the world from [=TrollTrace=] by having done so.
* BaitAndSwitch: In "Skank Hunt", she looks suicidal when she's shown at the edge of a bridge, but she was really just quitting Twitter and throwing her phone into the river.
* BreakTheCutie: Season 21 has definitely done this to her. She gets constantly mocked by the other girls for having Cartman as her boyfriend, said boyfriend constantly emotionally abuses her, and manipulates her into rejecting the only person (Kyle) who showed her any sympathy this season. It was inevitable that she would go from a NiceGirl to a GenderFlipped version of her boyfriend.
* BrokenBird: She becomes one by season 21. She failed to stop [=Skankhunt42=] last season, is frequently picked on by the other girls, and is stuck in an emotionally abusive relationship with Cartman. She tries to cope with all of this by becoming a female version of her boyfriend, only to realize how much she has changed from the NiceGirl she was before. Because of this she [[spoiler:breaks up with Cartman for good]].
* BrokenHero: Despite getting viciously trolled, shunned by her friends, and mentally abused by Cartman, she still tries her see the best in everyone and goes out of her way to help those in need. That said, she does have her breaking point and becomes Cartman's DistaffCounterpart because of the constant all of the above.
* BroodingBoyGentleGirl: Was the Gentle Girl to Cartman's Brooding Boy.
* CharacterDevelopment: Goes from a judgmental BitchInSheepsClothing first shown in "Marjorine" to a humble NiceGirl after quitting twitter and hooking up with Cartman. However, her self-esteem has also drastically decreased making her submissive to Cartman's abuse. This eventually causes her to adopt Cartman's personality making her nastier than she ever was before. However, she learns how much Cartman's influence changed her, which makes her come to her senses and give her the courage to stand up to Cartman, not cull to his demands, and [[spoiler: break up with him for good.]]
* CharacterizationMarchesOn:
** Was shown to be a BitchInSheepsClothing who picked on the "new girl"[[note]]whom was really Butters DisguisedInDrag[[/note]] in "Marjorine" and ridiculed Lisa Berger for her insecurity in "The Hobbit", but as the show entered its 20th season she has been shown to be nicer.
** She was shown with numerous different parents throughout the series. Even after her properly renamed introduction in "Marjorine" where her parents are revealed, she was still shown with different parents in "Cartoon Wars Part II", "La Petit Tourette", and "Medicinal Fried Chicken".
** In "Follow That Egg!", she hates Cartman as much as everyone else, and is upset about being paired with him on the egg project.
* CharlesAtlasSuperpower: Emoji Analysis lets her see meaningful patterns in absolutely anything, even things she does not understand (such as [[spoiler:the engineering problems that need to be overcome in order to reach Mars), to the point of being able to correct the equations herself]], by replacing what is to her meaningless data with something else, which lets her know that [[spoiler:two lines in the equations are misaligned]], and even lets her produce the season's DeusExMachina.
* CoordinatedClothes: In Season 20, she was always shown wearing matching clothes when she was with her boyfriend Cartman.
* TheCorruptible: As of "Doubling Down", Cartman starts slowly turning her into a female version of himself, tricking her into eating unhealthy foods to make her fatter and convincing her that Kyle (and Jews in general) are terrible people (after Kyle nearly convinced her to leave Cartman). [[spoiler: Thankfully she learns how listening to Cartman has negatively changed her health so decides not to believe his lies after breaking up with him for good.]]
* DefrostingIceQueen: While earlier episodes such as "Follow That Egg!" shown Heidi contemptuous of Cartman, when she becomes promoted to main cast starting in Season 20 and starts dating him, she treats him very kindly. By season 21, Cartman got irritated by how overly affectionate Heidi is towards him and ends up turing her into a female version of him.
* DistaffCounterpart: By episode 8 of Season 21, she's essentially become a female Cartman, becoming obese and adopting all his prejudices, selfishness, and casual cruelty. [[spoiler: It becomes one of the reasons why she broke up with Cartman in "Splatty Tomato".]]
* TheDogBitesBack: Cartman is an asshole who brainwashed her into becoming his DistaffCounterpart. That said, he learns the hard way what the rest of the protagonists have to deal with, and it's obvious she becomes the one who wears the pants in their relationship.
* EarlyInstallmentCharacterDesignDifference: Used to have black hair, rather than light brown, and flip-flopped between the colors for a while.
* EvilVegetarian: Not as first, but she still claims to be a vegan after her TookALevelInJerkass. Subverted because Cartman tricked her into eating meat.
* FallenHeroine: Originally one of the kindest characters in South Park and one of the leading heroes in Season 20, by the next season Cartman's influence has turned her into his DistaffCounterpart turning all her kindness into complete jerkassery. [[HeelRealization She eventually realizes how far she has fallen]], when Kyle declares he could ''never'' have any feelings for the person she has become.
* FatBitch: Due to Cartman's influence, she becomes both obese and a terrible person by "Moss Piglets". [[spoiler: this [[HeelRealization changes]] in "Splatty Tomato".]]
* FormerlyFit: She used to be healthy eating a vegan diet. However Cartman tricked her into eating "Beyond" KFC and "Beyond" Arbys and she has become nearly as fat as him.
* FreudianExcuseIsNoExcuse: What Heidi learns at the end of "Splatty Tomato". Even though she suffered a mentally abusive relationship with Eric Cartman, it doesn't mean she can become a horrible person. She decides to end this problem once and for all [[spoiler: by breaking up with Cartman for good.]]
* TheFriendsWhoNeverHang: After hooking up with Cartman, she all of the sudden stopped hanging out with the girls and is almost only shown with her boyfriend now. This is probably explanatory though, since she didn't want to get involved with the drama of the gender war that her friends was participating in, and instead wanted to put an end to it alongside Cartman (who felt the same way about said gender war).
* GoodCounterpart: She becomes this for Eric Cartman. Like Cartman, she was an [[FatBastard Fat]] {{Jerkass}} who would use her role as the victim as a way to justify being awful. Unlike him however, Heidi learns how unhealthy this way of thinking is, and actually is capable of making changes to better herself.
* GrewASpine: After dealing with Cartman's abuse throughout Season 21 and being converted into his DistaffCounterpart, Heidi finally grows her own in "Splatty Tomato" when she [[spoiler: makes it clear that they are breaking up for good, even ignoring his suicide threats that originally kept her from leaving.]]
* HeelFaceRevolvingDoor: Has a tendency to switch from a NiceGirl to a {{Jerkass}}. She had made her debut in "Rainforest Shmainforest" but wasn't given much characterization making her neutral on the moral spectrum. Then she was given her first major appearance in "Marjorine" where she shows herself to be quite an AlphaBitch amongst her friends making her a Heel which lasted until "Skank Hunt" which gives her [[AscendedExtra more prominence]] and [[TookALevelInKindness becomes much nicer]]. Then after [[OfficialCouple becoming Cartman's girlfriend]] and [[ToxicFriendInfluence letting his influence turn her]] into his DistaffCounterpart she becomes a Heel once more in "Moss Piglets" which lasts until "Splatty Tomato" where she gets a HeelRealization and [[spoiler: breaks up with Cartman for good]] making her a Face again.
* HeelRealization: After Kyle declares he can never love her current self in season 21's finale, Heidi begins to look back on how she got to the point of being a female Cartman, realizing how he slowly destroyed her mentally and physically including attempts of murder. Heidi has enough [[spoiler: and breaks up with Cartman for good, no longer wishing to be the victim.]]
* HisOwnWorstEnemy: Ultimately, the biggest reason why Heidi becomes a [[DistaffCounterpart female Cartman]] isn't actually Cartman but is instead her own {{Pride}}. She doesn't want to admit that she made a bad decision dating Cartman, and when her friends mocks her about that matter she chooses to back to Cartman and believe his lies. She [[HeelRealization eventually realizes]] that it was her own fault that she deteriorated so much, both physically and mentally, and decides to make the logical decision to [[spoiler: break up with Cartman for good.]]
* HonorBeforeReason: Kyle eventually realizes that the reason she won't break up with Cartman despite the horrible way he treats her is because she doesn't want to have to admit to the other girls that they were right and dating him was a bad idea. When she does, she gets frustrated when the girls go a little too far in [[IToldYouSo teasing Heidi about dating Cartman, which causes her to go back to Cartman and buy his lies]]. Basically she would rather suffer in an abusive and manipulative relationship than swallow her pride and own up to her mistakes. [[spoiler:Thankfully, she does realize how much this way of thinking has changed her, so she decides to finally own up to her mistakes by breaking up with Cartman for good.]]
* HorribleJudgeOfCharacter: Goes with the territory of being Cartman's girlfriend. Though to her credit, Cartman was a genuinely nice boyfriend in the beginning of their relationship. Something she actually points out shortly before [[spoiler:breaking up with him for good]].
* IdiotSavant: PlayedWith. She's certainly not an idiot, despite her seeming lack of social skills, but her skills in Emoji Analysis are nothing short of savantlike.
* IHatePastMe: Throughout "Splatty Tomato" Heidi constantly switches from fondly remembering her more naive and happier self to showing nothing but bitterness and contempt for her.
* InformedAttribute: In-universe example. Her boyfriend Cartman was constantly telling her and everyone else how "smart and funny" she was in Season 20. While she ''is'' shown to be quite smart, she never really says or does anything funny, which she and other characters pointed out.
* InformedFlaw: Wendy says that she has a flat butt in "The Hobbit", but much like the rest of the people she insulted, that feature doesn't seem to apply to her and hasn't been looked into any further.
* InnocentBigot: Thanks to [[TheCorrupter Cartman]], who manages to brainwash her into sharing his anti-Semitism. She still acts sweet and polite to Kyle as she breaks up with him, but he immediately realizes she essentially called him a "dirty Jew." She drops the innocent part by the next episode.
* ItSucksToBeTheChosenOne: Once Cartman convinces everyone that she's their only hope to get to Mars in "Not Funny", she pretty clearly knows that she's been forced into something far beyond her own abilities.
* JerkassRealization: In season 21's finale Heidi realizes how horrible she has become thanks to Cartman's influence on her in the aforementioned season.
* LivingProp: Though not completely silent, Heidi was mostly a background character prior to Season 20.
[[/folder]]
[[folder:N-Z]]
* NiceHat: Gets a stripped one with a flower on it in "Skank Hunt".
* NiceGirl: Going hand-in-hand with her constant attempts to help people on a large scale, there doesn't seem to be a single person Heidi dislikes. Even Cartman. ''[[OfficialCouple Especially]]'' [[SickeninglySweethearts Cartman]]. Unfortunately after "Moss Piglets", she has [[TookALevelInJerkass changed]].
* NotAfraidOfYouAnymore: In contrast to previously taking Cartman back when threatens to kill himself in "Put It Down", she firmly states thats not going to work and leaves when Cartman pull this stunt again in "Splatty Tomato" making it clear to him [[spoiler: that this time they are breaking up for good.]]
* OddFriendship: Develops one with Cartman after they both go off Twitter, which eventually evolves into a relationship.
* OfficialCouple: With ''Eric Cartman'', of all people. [[spoiler: However the relationship ends in “Splatty Tomato” when she breaks up with Cartman for good.]]
* PingPongNaivete: Is smart enough to figure out how to uncover anybody's identity online, and create the energy source required to go to Mars, but doesn't know that [[LessDisturbingInContext showing her private parts to a boy she barely knows]] is inappropriate behavior. These events happen in the same season.
* PoliticallyIncorrectVillain: She starts spewing ableist and classist rhetoric in "Moss Piglets".
* {{Pride}}: The reason why she doesn't want to break up with Cartman, even if she knows he's a bad influence for her.[[spoiler: Eventually she learns to forgo her pride upon realizing how much it cost her, both physically and mentally, and breaks up with Cartman.]]
* ProtagonistJourneyToVillain: Season 21 gives the most focus to her deteriorating relationship with Cartman and it transformed her from a NiceGirl to his DistaffCounterpart. [[spoiler:Subverted when she gets a HeelRealization and breaks up with Cartman.]]
* RiseOfZitboy: After gaining weight, she now has two pimples on her face, probably caused by all of the grease in the KFC Cartman has been feeding her.
* ShadowArchetype:
** To Wendy Testabuger. Both are very intelligent compared to the other girls, had feelings for Eric Cartman, and are the only known female students to wear hats. However Heidi lack Wendy's strong will and thus never learned to resolve her feelings for Cartman on her own like Wendy did, [[spoiler: needing an ArmorPiercingResponse from Kyle to make her realize how her feelings warped her judgment]]. As a result while Wendy was able to keep her positive attributes, lose all her feelings for Cartman, and retain her self-identity, Heidi loses all her attributes and stayed in a romantic relationship with Cartman long enough for his [[ToxicFriendInfluence toxic influence]] to turn her into a [[DistaffCounterpart female version of himself]].
** She also may be considered one to a female [[VideoGame/SouthParkTheFracturedButWhole New Kid]], at least in regards to their contrasting relationships with Cartman. While Heidi's relationship with him is romantic, the New Kid has more of a teacher/student bond with him. Heidi came to Cartman and the two bonded over falling off the social media grid while Cartman [[BecauseYouWereNiceToMe went out of his way to be nice to the New Kid and thus earned her loyalty]]. [[spoiler: And while Heidi broke up with Cartman after realizing what his influence turned her into, The New Kid had no problems with anything Cartman was having her do, until Cartman betrayed her and kidnapped her parents, which caused her to lose all respect for him.]]
** She also becomes a shadow to her old self. Contrasting the kind, caring, naive, and healthy girl she once was before dating Cartman to the bitter, resentful, bigoted, and fat {{Jerkass}} she became while dating him. "Splatty Tomato" in particular points this out.
* TheSmurfettePrinciple: She is the only female character to appear in the Season 21 DVD box cover.
* SourOutsideSadInside: Sure she's become the GenderFlipped version of her boyfriend Cartman by "Moss Piglets", but that's because she doesn't want to be constantly abused emotionally by her peers and Cartman, even if it means abusing them herself. This is more explored in "Splatty Tomato" where despite acting horrible, she's just so broken.
* StepfordSmiler: She may be all bubbly and happy for most of Season 20, but in "Douche and a Danish" she breaks down crying after her plan to help Denmark turns out to be for nothing, suggesting that she doesn't have very good self-esteem.
* SuddenNameChange: Was originally identified as "Marcy" in "Probably", but was later properly renamed Heidi in "Marjorine".
* TemporarilyAVillain: Her time as a [[DistaffCounterpart female Cartman,]] which started in "Moss Piglets" and lasted until "Splatty Tomato".
* ThenLetMeBeEvil: After being picked on by her friends for going out with Cartman, she decides to let him manipulate her and become his DistaffCounterpart. [[spoiler:She snaps out of it in "Splatty Tomato".]]
* TookALevelInBadass: [[spoiler: As of "Splatty Tomato" she has abanbons the victim-mindhoodset and no longer has any problems dumping Cartman, showing how strong she really is or has become.]]
* TookALevelInKindness: Prior to Season 20, she could be unkind to the point of cruelty. After Season 20, however, she's arguably one of the nicest of the 4th grade girls. However...
* TookALevelInJerkass: By "Moss Piglets" in Season 21, she has become a female version of Cartman. [[{{Subverted}} However,]] it serves more as a [[JerkassFacade defense mechanism]] to endure all the emotional stress given to her rather than becoming genuinely malicious. When she [[HeelRealization realizes]] that [[BecomingTheMask she took it too far]], she decides to resolve this issue [[spoiler: by breaking up with Cartman.]]
* ToxicFriendInfluence: Cartman's influence essentially turns Heidi into a female version of himself. She ends up an obese, racist, and selfish {{Jerkass}} towards everyone. While the transformation was initially intentional on Cartman's part, he quickly realizes how [[GoneHorriblyRight awful it is to be around someone like himself]].[[spoiler: Likewise, Heidi doesn’t like what Cartman’s influence turned her into and breaks up with him for good because of it.]]
* TragicBigot: Originally Heidi was a sweet innocent girl who wanted to put an end to trolling and bring all genders together along with her boyfriend, Eric Cartman, back in Season 20. However her efforts were rendered null when Cartman undermined her attempts because he was afraid that she would leave her if she uncovered his bigoted past. Fast-forward to Season 21 Cartman, who has regressed to his old self, decides to manipulate her into becoming a bigot like him. She lets him manipulates her with his bigoted views after getting back together with him so she would not feel stupid in front of her friends, all of whom have mocked her for ever considering hooking up with him in the first place. She eventually turns into another version of Cartman, becoming fat and highly prejudice towards, Jews, and The handicapped.
* TroubledAbuser: After being abused by Cartman for the majority of Season 21, she starts adopting his personality and began abusing him.
* UnwittingInstigatorOfDoom: When she gave her "Emoji Analysis" to [[PsychopathicManChild Lennart Bedrager]], she didn't know that he'd use it to cause mass hysteria and a world war.
* WhatHaveIBecome: After hearing Kyle's ArmorPiercingResponse in "Splatty Tomato", she becomes disgusted with herself for becoming Cartman's DistaffCounterpart. At first, she blames Cartman and prepares to kill him for, in her own words, "turning me into this!" However, she soon realizes that it was her "I'm a victim" attitude that resulted in her deteriorated state.
* YouExclamation: She gives this to Cartman near the end of "Splatty Tomato".
* YouKilledMyFather: Averted. Her father is killed in "Probably" because of Cartman's [[NoOSHACompliance negligence]], but, as shown in Season 20, she doesn't seem to hold it against him, or even remember it. She is shown with different, living, parents in other episodes. [[WatsonianVersusDoylist Either her mother remarried, or the writers just reused Heidi's character model for generic girls early on]].
[[/folder]]
