Belowski, known in Japan as Mokeo Motegi is an Obelisk Blue student and the former top student of Duel Academy who has the power to communicate with Duel Monsters. Belowski is a laid-back, carefree, peace-loving boy who isn't afraid to take a nap at the most precarious of times.

Those in his presence gradually fall asleep without proper precautions and therefore he is confined to his own personal dorm, "a secluded paradise within the depths of the school" as Dr. Crowler calls it.