Before acting on his dark impulses, as Zamasu, he was a calm and patient individual, willing to listen to his teacher's words. However, he long harbored an utter hatred for mortals, perceiving them as a blasphemy and the gods' greatest mistake. He came to hate the gods for not doing anything about their "mistake". After giving in to his desires, Zamasu mercilessly killed his former master as his first step down a dark path.