Goku Black is actually a Shinjin named Zamasu from Universe 10. He is the main antagonist of the “Future” Trunks Saga of Dragon Ball Super. Zamasu is having excellent fighting skills and therefore he was sent to train with one of the current Supreme Kai, Gowasu.
Goku Black (Zamasu) learned more of the mortals of that universe, and later on he began to reject this training with the Kais and began plotting a plan to eradicate all mortal life, which he later called the “Zero Mortals Plan”.
Read More: How Old Is Goku?
Zamasu killed his master Gowasu to eradicate all mortal life and launch his own “Zero Mortals Plan,” as he believes mortals are destructive by nature – especially Saiyans like Goku, who can achieve the power to rival the gods.
In the wake of meeting Goku, and learning of the Super Dragon Balls, Zamasu used the balls to swap bodies with Goku, killing his old body with Goku caught inside it. He was then given the name “Goku Black” or someone calls Black Goku, Zamasu uses Gowasu’s Time Ring to go to Timeline 2 where Future Trunks lives. In this way setting off the chain of time-adjusting events known as “The Future Trunks Saga” in Dragon Ball Super.
Origin of Goku Black
The concept of Goku Black originated from the “Copy Of The Hero” idea in media such as “False Ultra Man” of the Ultraman series or “False Kamen Rider” of the Kamen Rider franchise.
Physical Appearance of Goku Black
His unique appearance is the same as his future timeline counterpart. He is having an above-average height Kai of slim built and green skin and with a white Mohawk.
However, after killing the original present Gowasu, he wore his previous master’s (Gowasu’s) matching attire set of green with gold chains Potara earrings.
Read More: Super Saiyan Goku
After stealing the first present main Goku’s body, it experienced some physical changes. While still essentially indistinguishable, he has a slightly darker skin tone and then some “characterized” eyes, alongside a somewhat skinnier physique.
His hair is also a noticeably in a black darker shade with just four front spikes and three back ones.
After taking Goku’s body, he began wearing a dark grey vest, a long-sleeved black undershirt with a turtleneck, a red sash, black pants and pointy white boots.
Goku Black gave the right Potara earring to his future counterpart while still wearing the other earring on his left ear.
In the anime, Goku Black also wears a Time Ring on his right index finger, while in the manga, his counterpart is trusted with wearing it. Also, he has dark outlines around his eyes, in the manga.