|Age||Presumably 5 or 6|
|Debut Episode/Fic||"Best Friends Forever"|
Karen McCormick is Kevin and Kenny's younger sister, and the daughter of Stuart and Carol. She is very shy and timid; Kenny is very protective of her and uses his identity as Mysterion to comfort her in hard times to such a degree that she considers him her "guardian angel".
Please visit her article on the South Park Archives for more information.
Karen looks very similar to Heidi Turner hair and clothes wise. She has brown hair and wears a green jacket with a plum colored collar and purple mittens. She has a smudge of dirt on her face, clothes and in her hair.
Karen seems to be relatively quiet and timid, indicating shyness. She is also very childlike, but considering her age, this is normal. She is almost always seen with Kenny. She seems to be very attached to her doll, as she brings her doll with her everywhere she goes. She usually cries when dealing with stressful situations, until Mysterion shows up and comforts her.