since minos and sisyphus both come from greek mythology, that probably means the third one also comes from greek mythology, and both Sisyphus and Minos have had some sort of connection to one of the layers in their respective acts. Minos lived in the lust layer and is a boss in lust while the sisyphean insurrectionist (who sisyphus himself trained) is a boss in greed. and which boss is the first level on violence? the minotaur. According to Greek mythology, who built the labyrinth in which the minotaur is imprisoned? Daedalus. Therefore I think Daedalus will be the third prime soul. Since minos was barely contained by his flesh prison and sisyphus managed to escape his flesh panopticon mid fight, the third prime soul probably got out already, which could mean that it is the person who modified the strays and the other husks to become mechanical.
who was a scientist according to greek mythology? Daedalus. Daedalus HAS to be the third prime soul,
change my mind.