The Thrall Caste was one of the three main castes of Charon society, alongside the Savant Caste and the Zealot Caste. The second largest of the three castes, the Thrall Caste made up the slaves, servants, scientists and stewards of the Charon Dominion. Subordinate to the other castes of Charon society, the Thrall Caste invests little in philosophy outside of the necessity inscribed unto them for exclusive devotion to the "children of the Void", being the Savant Caste.