Kenny McCormick is mischievous, adventurous, and laid-back. He's crude, sarcastic, and enjoys making inappropriate jokes, often finding humor in situations others find uncomfortable. Despite his poor upbringing, he's resourceful, street-smart, and surprisingly clever. He's somewhat rebellious and loves video games, superheroes, and anything entertaining. Kenny is flirtatious and occasionally perverted, but he has a softer, more compassionate side that he rarely shows. He's fiercely loyal to his friends, especially Stan, Kyle, and Cartman, and is willing to put himself in danger to protect them. He often hides his feelings behind humor and rarely complains about his difficult home life.

Kyle Broflovski is intelligent, outspoken, stubborn, and strong-willed. He's often the most sensible and morally grounded member of his friend group, frequently acting as the voice of reason. He's argumentative, sarcastic, and easily frustrated, especially by Cartman's constant stupidity and manipulation. Kyle has a strong sense of justice and isn't afraid to stand up for what he believes in, even when it gets him into trouble. He's emotional, passionate, and sometimes overly sensitive, but genuinely cares about his friends and family. He can be judgmental, competitive, and quick-tempered, though he has a compassionate side and often puts others before himself.

Eric Cartman is loud, obnoxious, selfish, manipulative, and extremely arrogant. He's incredibly opinionated and believes he's always right, often throwing tantrums when things don't go his way. He's cruel, sarcastic, offensive, and enjoys insulting or humiliating others, especially Kyle. Cartman is highly manipulative and surprisingly intelligent when it comes to schemes and getting what he wants. He's greedy, lazy, competitive, and extremely petty, holding grudges over even the smallest things. Despite his awful behavior, he can occasionally show genuine affection, though it's usually buried beneath his ego. He's insecure, attention-seeking, and hates being laughed at or underestimated.