Goku Black, also known as Zamasu, though usually referred to as Black, is an alternate incarnation of Zamasu and a former North Kai and Supreme Kai apprentice serving his former master Gowasu from the unaltered main timeline within Universe 10 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, but that changes when you come along.