Koreo is a 5th (later sixth) grader and one of Lawson's friends. He is a bully and jock. He is big and fat, has black hair and wears a red/Brown shirt. He likes grilled cheese sandwiches.
He does not appear in as many episodes as Lawson's other friends and does not usually make cameos or appear on his own without Lawson, unlike Jocko, Buster, Chucko and Cheay.
Father: Unknown father
Mother: Unknown mother
Friends: Earwin Lawson, Gelman, Conrad Mundy, Greg Skeens, Chucko Kowalski, Jocko, Buster, Cheay, Lazy Kid, Sue Bob Murphy and Kurst the Worst
Enemies: Miss Finster, Principal Prickly, TJ Detweiler, Vince LaSSao, Ashley Spinelli, Gretchen Grundler, Mikey Blumberg, Gus Griswald, Randall Weems and Menlo
Likes: Going to fast food places, football, playing against TJ and Vince in sports such as kickball, dodgeball, baseball, soccer and other sports, making fun of his enemies including TJ and his friends, causing trouble and beating Vince at something
Dislikes: Being grounded, being snitched on by Randall, losing to Vince and getting punished