Kenny is the poor kid in the group, often eating canned food and frozen waffles for dinner. He also tends to die quite a bit, being killed in innumerable ways during the first 5 seasons.
Although his speech is muffled under that famous orange hoodie, he is the most sexually knowledgeable of the boys and often professes his love for titties. His soul was briefly trapped in Cartman's body before it returned back to earth. He also briefly dated a 5th grader, Tammy Warner, before he died of syphilis.
BUT, unlike most of his classmates, Kenny DOES posses a special power...He can't die. But he uses this power for good, keeping watch over South Park as the illusive superhero Mysterion.