Society of Light is the second arc of the Yu-Gi-Oh! GX anime, encompassing the series' second season. The dubbed version splits it into two arcs, with Society of Light encompassing the first half and Genex Tournament encompassing the second half. The main antagonist in this arc is Sartorius, the leader of the Society of Light. Many new characters are introduced here such as Tyranno Hassleberry and Aster Phoenix.