Duel Academy, known as Duel Academia in the Japanese version, is the setting of most ofYu-Gi-Oh! GX. It is a dedicated school that trains Duelists to a professional level, so they can ideally enter the Pro League. It has three dormitories: Slifer Red, Ra Yellow, andObelisk Blue. Students there usually wear blazers that match their dorm color. It is owned by Seto Kaiba. Duel Academy has four main subsidiaries: North Academy, South Academy, East Academy and West Academy. Due to these locations, Duel Academy has sometimes been referred unofficially as Central Academy. Students also carry PDA-like devices on their person. The devices are used for communication between teachers and other students, like a video cell phone or e-mail. They are also used for digitized duels between users.