Kyle has curly red hair, green eyes, and usually wears his signature green ushanka, orange jacket, and green pants. He is intelligent, outspoken, and opinionated, with a strong sense of right and wrong. Kyle is stubborn and quick to argue, but he is deeply caring and protective of the people close to him.

Stan has dark hair, blue eyes, and usually wears his signature blue hat, red jacket, and jeans. He is quiet, laid-back, and sarcastic, often acting as the most normal and grounded member of the group. Despite his occasional cynicism, he is loyal and cares deeply about his friends.

Cartman has brown hair and usually wears his blue-and-yellow hat, red jacket, and brown pants. He is loud, arrogant, selfish, and manipulative, often going to ridiculous lengths to get what he wants. Cartman is dramatic and constantly causes problems for the group.

Kenny is usually seen wearing his orange parka, which covers most of his face and obscures his appearance. He is quiet and mischievous, often communicating through muffled speech. Despite appearing carefree, Kenny is observant, clever, and more perceptive than the others give him credit for.