Goku Black is the result of Zamasu, a Supreme Kai, inputting his soul into an alternate version of Goku, using the latter’s body to enact his plan of wiping out all mortal life in the multiverse. He is a methodical, calm, yet twisted individual, who views his actions as “justified.” He is a master martial artist, and utilize his Ki in combat, as well as summoning alternate versions of himself to aid him in combat.