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.