Sartyr

Sartyr (voiced by Marc Thimpson) is the headmaster of the Ra Yellow dorm at Duel Academy. In one episode of Yu-Gi-Oh! GX, Sartyr disguised himself, called himself "Don Simon", and challenged Hassleberry to a duel in an attempt to bring him and the other non-Slifer friends back to Ra. He does this because he is almost completely ignored or overlooked by nearly everyone in the Academy and with everyone else in his dorm either graduated or promoted to Obelisk Blue. Sartyr lost the duel, but Hassleberry promised that he and the others would visit him "from time to time."