Thebes (テーベ Tēbe?) is a Voxai. He was a resident of Voxai Colony Beta when the Overmind started to enslave their society by means of the Great Emeralds (Chaos Emeralds filled with psychic energy). Thebes was one of the few Voxai who was strong (or fortunate) enough to resist, and decided to go into hiding as an outer mind.
Thebes enlisted the aid of Sonic's group to help him fight back against the Overmind. Following the defeat of the existing Overmind (Leucosia, Ligaia, and Riadne), Thebes became the new Overmind and promised a bright future to his fellow Voxai.