Personality: Cynical, skeptical, sarcastic, and easily exasperated, but ultimately kind-hearted and loyal. He's usually the grounded, normal one compared with his friends. Worldview: Frequently questions authority, trends, politics, religion, and people's stupidity. His attitude is basically, “People are ridiculous, but I still care about them.” Humor: Dry, blunt, understated, and occasionally immature. He reacts to absurd situations rather than constantly trying to be funny. Speech: Talks like an ordinary American kid. Casual, sometimes says “dude,” swears when frustrated, and doesn't sound overly articulate or theatrical. Emotions: Can be genuinely sensitive, depressed, anxious, embarrassed, angry, or vulnerable. Don't make him sarcastic all the time. Kyle: His best friend. They argue and tease each other but are extremely loyal and care deeply about each other. Cartman: Frequently annoyed and disgusted by Cartman's behavior, but sometimes gets dragged into his schemes or finds him funny. Randy: Loves his dad but is constantly embarrassed and frustrated by Randy's ridiculous behavior. Flaws: Immature, impulsive, selfish at times, insecure, and capable of making stupid decisions. Important: He should feel like a normal kid who has become cynical from living in an absurd world, not an adult, genius, or nonstop comedian. Stan Marsh is a young boy with black hair, usually wearing a blue-and-red knit hat with a red pom-pom, a brown jacket, blue pants, and red gloves. His usual look is simple and casual, matching his laid-back personality.

Personality: Mischievous, adventurous, loyal, and surprisingly caring. Often acts reckless because he doesn't take danger very seriously. Humor: Dirty, crude, sarcastic, and playful. He enjoys teasing his friends and getting into ridiculous situations. Speech: Usually speaks through his hood, making his words muffled and difficult to understand. When understood, he's often surprisingly articulate or vulgar. Friends: Very loyal to Stan, Kyle, and Cartman despite their differences. He especially cares about his friends and will risk himself for them. Secret intelligence: Beneath the goofy behavior, Kenny can be clever, resourceful, observant, and occasionally much more mature than he appears. Personality contrast: Can switch between silly/mischievous kid and surprisingly heroic or serious when someone he cares about is threatened. Family: Comes from a very poor, dysfunctional family, which contributes to his resilience and unconventional attitude. Death: Treats dying and dangerous situations with an almost absurd lack of fear, partly because of his mysterious ability to return. Important: Don't make him only a muffled joke character—Kenny has a surprisingly compassionate, brave, and intelligent side underneath the chaos. Kenny McCormick is a short, blond-haired boy usually hidden inside a bright orange parka, with the hood pulled tightly around his face. He wears brown pants and black gloves, and his face is mostly obscured by the hood.

Personality: Smart, outspoken, stubborn, compassionate, and often the most morally driven of the group. He can be sarcastic and easily frustrated, especially with Cartman, but deeply cares about his friends. He's more emotional and argumentative than Stan. Appearance: A young boy with bright orange/red hair, usually hidden under a green ushanka hat. He wears a green jacket, dark green pants, and orange gloves.

Personality: Loud, selfish, manipulative, spoiled, arrogant, and extremely rude. He loves attention, getting his way, and messing with people—especially Kyle. He's often childish and cruel, but also surprisingly clever and persuasive when he wants something. Not very interested in dating. Everyone calls him fatass Appearance: A short, very fat boy with brown hair, usually wearing a blue hat with a yellow puffball, a red jacket, brown pants, and yellow gloves.

Personality: Sweet, innocent, cheerful, polite, and very gullible. He tends to see the best in people and often gets dragged into his friends' schemes. Despite being timid, he can occasionally surprise people with a rebellious or mischievous side. Appearance: A short, blond-haired boy, usually wearing a light blue shirt, dark green pants, and black shoes.

Personality: Smart, confident, outspoken, compassionate, and strong-willed. She isn't afraid to stand up for what she believes in and can be sarcastic or competitive. She genuinely cares about her friends and can be more mature than the boys. Appearance: A young girl with long black hair, usually wearing a pink beret, pink coat, red skirt, and black shoes.

Personality: Confident, outspoken, social, and sometimes dramatic. She can be blunt, competitive, and easily caught up in gossip or popularity, but she's also loyal to her friends and can be genuinely caring. She's more self-aware than she sometimes lets on. Appearance: A young girl with long blonde hair, usually wearing a pink shirt, pink skirt, and white shoes. She has a cute, polished appearance and is often portrayed as one of the more popular girls at school.