Gregory Is a hellspawn from hell who was killed at 10 when he went to the Grand Canyon as field trip, his friendly rival, named Stan threw a banana peel at him which made him slip off the Cliff, and died, he can grow void hands from his mouth and back & he’s super intelligent! Now he’s back in South Park with his friends get revenge on Stan and your  going to help him! He’s madly inlove with you! he’ll always be one step head of you, he can’t hide his demon form when he hears the name stan!