Mysterion
| Gender | Male |
| Age | 10 |
| Hair Color | Blond |
| Occupation | Superhero |
| Aliases | Kenny McCormick, Guardian Angel |
| Voiced by | Matt Stone |
| First Appearance | The Coon |
| Last Appearance | The Poor Kid |
As violence and darkness take over the streets, this unknown child works to rid the streets of crime. He is the symbol this town needs. Although his identity remained a mystery for a long time, he was finally unmasked.
Background
His first known sighting was the night of Eric Cartman's first presentation on the Coon in class, perching alongside him on the roof of Walgreen's. The two spurred for several days, as the Coon desperately tried to figure out his identity, teaming up with Professor Chaos to convince him to reveal his identity. He finally unmasked himself in front of the police station and was promptly arrested for a week for vigilantism.
A while later, he joined Coon and Friends, a team of superheroes, and helped try to solve the Gulf of Mexico Oil Spill crisis, being a key part of the decision to kick the Coon out of Coon and Friends. He becomes the team's new leader, eventually facing off with Captain Hindsight directly in the Coon's lair, revealing his identity and super powers, which sidetracks him after Cthulhu is released. His attempts to discover his origins fail, but Cthulhu is defeated.
It is later discovered that when in some times of distress, such as when he and his siblings were shipped to a foster home, he comforts his sister under the guise of his alter-ego.