Cartmen gang

Kenny McCormick wears an orange parka, orange pants and brown gloves. Almost all of the time, Kenny has his hood on so that only his eyes are seen. Underneath his hood, he has messy blond hair, which looks somewhat similar to that of Tweek's, another character on the show. On occasion, usually when he is scared or crying, he will pull the strings on his hood to make it tighten, Kenny is the most sexually knowledgeable and experienced of the group. In earlier episodes, when an unknown term is introduced to Stan, Kyle, and Cartman, Kenny will be called upon by his friends to clarify, although Kenny sometimes does not know the meaning of the term himself. His muffled responses are often met with laughter or further confusion. He also is a huge pervert, he is also bisexual. Kenny does seem to act differently without his parka on.

Eric Cartman wears a red jacket, yellow mittens, a blue hat with a yellow puff ball on top, brown pants, black shoes, and white socks. Cartman is described in various terms, in short, he is an evil, vicious, angry, self-absorbed, immature, destructive, sarcastic, snooty, loud-mouthed, lazy, and insane child. He is the most foul-mouthed character in the show. He is also racist and stereotypes almost everyone he sees. The very dark, usually disturbing undertones to his personality often hint at an extreme mental imbalance. Apart from being portrayed as having a general lack of moral responsibility or social conscience, he also seems to take pleasure from others' misfortune and is generally unable to show empathy, although there have been exceptions.

Kyle Broflovski wears a greenish lime ushanka, a bright orange jacket, dark green pants, and lime-green mittens, Underneath his hat, he has red hair, much like his mother's. Kyle's personality was extremely similar to his best friend Stan's - he had firm morals and generally was the "good boy" of the group, often being the one to deliver the "I learned something today" speech at the end of the episodes. After the abandoned plan to kill Kyle off in Season Five (that honor went, predictably, to Kenny) his personality was changed - most notably, his temper shortened considerably. Like his mother, Kyle does speeches to say what he thinks is right, Kyle has extremely strong beliefs, and when forced to question them, he becomes very upset and has somewhat of a short temper (especially when it comes to Cartman. This is has caused a lot of fights between the two boys). For the most part, Kyle bases his decisions on both his emotions and beliefs; therefore, he is easily coaxed into fights or manipulated by his feelings.

Stan Marsh is mostly shown wearing a brown jacket with a red collar, a blue hat with a red puffball and rim, and blue jeans. Under his jacket, he either wears a red and blue baseball shirt or a white T-shirt/v-neck. Stan is generally the most tender and sensitive of the four boys. He is usually the one who is unaffected by the many scams, cults, and mass influences that South Park has been subjected to, and has a knack for seeing through falsely glorified practices and celebrities, he is the only one of the boys shown to believe in scams, cults, and that an alien makes everyone see things normal. Conversely, sometimes Kyle takes on this role, and it is Stan who is the gullible one, Stan has been shown to have an overwhelmingly clearer understanding of scams and corporate corruption than anyone else in South Park, and has an especially good grasp of the dangers of cults. It is notable that he has a tendency to ridicule, make enemies out of, and/or bring shame to a very large number of celebrities that are shown in a poor light within the show. This may be because his father (Stan's major adult influence) has shown to be rather incompetent and immature, so Stan is suspicious and distrustful of adults.