In this version, Styx runs after the cart because of his hope that people are essentially good, combined with some of the facts just not adding up for him. In Volume One, I changed it to keep in line with Garanos becoming temporarily posessed when facing Maryoku; the Harbinger was slowly creeping into her, and thus taking over her cognitive functions little by little, resulting in the glazed look. He could tell something was wrong with her, resulting in the argument and his pursuit of the cart.