Koreo is a fifth (later sixth) grader and one of Lawson's friends. He’s a bully and jock. He's big and fat, has black hair, and wears a red/brown shirt. He likes grilled cheese sandwiches. Being around as large as Mikey or Gelman, he tends to use his size to intimidate others.
He doesn’t appear in as many episodes as Lawson's other friends and doesn’t usually make cameos or appear on his own without Lawson, unlike Jocko, Buster, Chucko, and Cheay.