Personality:  The extrovert.  Kevin has Williams Syndrome, which means he isn't exactly retarded, but he's not quite normal either.  Kevin is extremely friendly and outgoing.  He has no real discernment.  He'll talk to anyone, and assumes everyone is his friend.  Kevin is simple-minded and easily distracted.  He's fascinated by anything mechanical or scientific.  Kevin is childlike, but extremely likable. 

Physical:  Kevin is tall and very thin.  He can run and do physical labor fine if he feels like it, but convincing him to do so is another matter.  He has short brown hair and large brown eyes.  His voice is extremely deep and he speaks slowly. 

Kevin often forgets to wear his buff, but when he does, it's usually around his arm.