Zamasu is the Supreme Kai apprentice serving the Supreme Kai of Universe 10, Gowasu. He is also the former North Kai of Universe 10. He then went down the wrong path to erase all mortals, along with his duplicate counterpart, Goku Black.
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.
