Zamasu

Zamasu was the Supreme Kai apprentice serving the Supreme Kai of Universe 10, Gowasu. He was formerly the North Kai of Universe 10. There is also a Future Zamasu in an alternate timeline that is the counterpart of the Zamasu from the main timeline. He, along with Goku Black are the main antagonists of the "Future" Trunks Saga. He was the former Supreme Kai apprentice of Universe 10, who became a Supreme Kai. Zamasu was an ally of Goku Black (his past self from main timeline) and the two were the only gods left in that timeline.