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Terrance Mephesto

Terrance Mephesto is a student at South Park Elementary and a former classmate and rival of the boys. He is the son of the owner of South Park Genetic Engineering Ranch, Dr. Alphonse Mephesto. He made his only speaking appearance in "An Elephant Makes Love to a Pig", acting as a rival and antagonist to the boys, and acting as a leader to Bill Allen and Fosse McDonald.


In his debut and only speaking appearance in "An Elephant Makes Love to a Pig", Terrance acts as a rival to the boys after Kyle comes up with the idea of making a small pot-bellied elephant for the science fair in Mr. Garrison's class. Terrance comes up with the idea of making a human clone to beat the boys at the science fair, with the help of his friends, Bill and Fosse. After taunting the boys at lunch with a "cloned" live human foot, he turns to his father, Dr. Mephesto, in order for him to create a full human clone. Mephesto acquires Stan's hair while the boys visit his ranch, and the result is a dangerous mutant clone, Clone Stan Marsh. While his father expresses concern that the clone is dangerous, Terrance insists on releasing it against his father's orders, exhibiting a lack of concern for the townspeople. After his father kills the clone, much to his disappointment, Terrance borrows one of his father's creations, the Four-Assed Monkey, to show at the science fair in place of the human clone, and nearly wins the first prize before the boys present a pig similar to Mr. Garrison.

From the second season onward, Terrance became a prominent background character, though he did not speak or appear in the boys' classroom again. He was sometimes seen as part of the boys' extended friend group in episodes after Season Four, such as in "Scott Tenorman Must Die", where he is among the students called by Cartman to help get revenge on Scott Tenorman, and "Raisins", where he plays on the boys' football team when Stan and Tolkien are absent. He has continued to appear in school assembly scenes into the current seasons.

He was referenced again in South Park: The Fractured But Whole and made a speaking appearance in South Park: Phone Destroyer, both published by Ubisoft, in 2017, twenty years after his debut episode.

Criminal Record

Video Games

South Park: The Stick of Truth (Cut Content)

Terrance was intended to appear in the game as an acquired friend on Facebook, and appeared in early versions of cutscenes in larger crowds of children, but ended up being removed entirely along with several other characters. It is unknown what role he might have played in the game. His friend icon is spelled "Terrence" in the game files. He had the same eyebrow models from Damien on his icon in an older game build.

South Park: The Fractured But Whole

In the quest "The Many Asses of Dr. Mephesto", his father Mephesto mentions him during a tour of his renovated generic engineering ranch. Upon arriving at the facility's third floor, he explains to the Freedom Pals that genetic engineering can be used to help humans, showcasing several genetic mutations of his son, admitting that most people don't remember that he once had a child. Stan mentions he remembers Terrance while Kyle admits wondering what had happened to him. Mephesto claims that Terrance had been killed by Barbra Streisand in her attack on the town during the events of "Mecha-Streisand", as children had been playing with the a relic that belonged to her, which Kenny admits was them. Wendy questions if reviving his dead son is his motivation as a genetic engineer, but Mephesto denies it and instead claims he intends to give his son's corpse more asses so he can "finally rest in peace".

South Park: Phone Destroyer

Terrance appears in the game as a Rare flying, ranged unit, appearing to have built a flying contraption and a weapon to join the kids' game. He can be seen during character creation walking in the background with Kevin in Mephesto's lab.


Terrance has medium-length combed brown hair and notably angry, ragged, spiky eyebrows, as well as a prominent chin. He wears a purple coat with yellow suspenders over a white shirt with a black tie, and orange pants with black socks. He has similar hair to Bill but with a lock of hair over his face. Unlike Bill and Fosse, Terrance's unusual eyebrows remained after Season Four and are occasionally seen.

To see images of Terrance Mephesto, visit Terrance Mephesto/Gallery.


Terrance appears to have an abrasive personality, actively seeking out conflict in "An Elephant Makes Love to a Pig". He also appears to be incredibly arrogant and self-centered; when his father warns him about the danger his clone poses to the people of South Park, he exclaims "They're all stupid anyway!". Terrance also disparagingly calls the other boys "dumbasses" and Kyle a "plebeian", showing his arrogant demeanor. Each of these insults suggests he believes himself to be more intelligent than his classmates. He appears to have some degree of intelligence as he and Kyle are both referred to as "straight-A students" by Mr. Garrison.


Dr. Alphonse Mephesto

In "An Elephant Makes Love to a Pig", Terrance is shown to greatly admire his father for his inventions and praises him after creating a human clone for his science fair, though they fall out when his son disobeys him, releasing the clone after he suggested getting rid of it after realizing it was too dangerous. Mephesto generally seems more level-headed and compassionate in contrast to his son's arrogance, exhibiting concern for the well-being of others and driven to address the problem by seeking out the clone. Mephesto still offers his son one of his creations to present at the science fair with his friends.

In South Park: The Fractured But Whole, Mephesto seems emotionally detached and distant when describing his son's passing, though he does seem to be doing what he believes will allow his son to eventually rest in peace.


Bill Allen and Fosse McDonald

Terrance is accompanied almost constantly by Bill and Fosse in "An Elephant Makes Love to a Pig". The pair are assumed to be part of Terrance's friend group, but they have not reappeared as a group since then. Terrance seems to be the most intelligent of the group, with Bill and Fosse merely following him around and passively affirming him, as well as helping carry his science projects for him and following his commands, akin to henchmen. He has not been known to join in their giggling or "that's gay" remarks.

The Boys

In his debut episode, Terrance, Bill, and Fosse appeared as a group rivaling the boys, betting that they could clone an entire human before the boys could crossbreed an elephant and a pig. His group's role as a rival to the boys was usurped by Craig and his gang or other incidental characters, particularly starting in the seventh and eighth Seasons.

Red McArthur

During the second and third season, he is often seen in the background with Red McArthur, most notably holding hands with her and Kevin Stoley during "Kyle's Mom's a Bitch" in South Park: Bigger, Longer & Uncut and throughout "World Wide Recorder Concert".



Despite his deceased status, Terrance has continued to make background appearances following his alleged death ("Mecha Streisand") and confirmed death (South Park: The Fractured But Whole). It is unknown whether this is simply an oversight on the animators' part or if he was revived off-screen.



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See also
List of Female 4th Graders | List of Male 4th Graders | Portal:Characters