Zamasu

Fused Zamasu (合がっ体たいザマス Gattai Zamasu), (known as Merged Zamasu in the anime and God Zamas in the Viz manga) usually just referred to as Zamasu (ザマス Zamasu), is a Potara fusion born of the union between Goku Black (the original present Zamasu in the original present Goku's body) and Future Zamasu. He is the final antagonist of the "Future" Trunks Saga. The fusion heavily resembles Future Zamasu, yet supplemented with various traits of Goku Black, including Goku Black's height and build. He possesses Future Zamasu's green skin, gray irises, and white hair; however, his face has more of Goku Black's jawline. He has Future Zamasu's eye shape, but with dark lines under the bottom eyelids and somewhat smaller ears. The fusion's hairstyle looks mostly like Goku Black's as Super Saiyan Rosé (Fused Zamasu himself is in the Super Saiyan Rosé form in all of his appearances in all Dragon Ball media, with the exception of his Infinite Zamasu form in the Dragon Ball Super anime), but with a long protruding bang over the right side of his face, representing Zamasu's mohawk.

He wears the original present Gowasu's green Potara earrings on both ears and Supreme Kai's clothing that is nearly identical to Future Zamasu's, but with Goku Black's color-scheme, undershirt and red sash. He also wears a Time Ring (in the anime only) on his right index finger.

With his fused body being an unbalanced mix, while his semi-immortal body struggles to properly heal from damage, his body's damaged sections mutate into a purple and slimy substance, which happened to the entire right half of his body. It also caused the sclera of his right eye to turn yellow and his pupil to turn purplish red. When Fused Zamasu used Light of Divine Justice, it caused his right arm to grow massive. Retaining the arrogance and self-entitlement of Goku Black and Future Zamasu, this fusion believes himself to be the embodiment of justice. Reveling in his power, Zamasu openly declared himself the supreme god upon his emergence, repeatedly and consistently vocalizing his divine brilliance and absolute authority. His ego is displayed by how he refuses to even defend himself against Goku and Vegeta (which continues to some extent until Goku blasts off half of his face during a beam struggle), his tendency to hover high over the battlefield to "look down" on everyone both figuratively and literally, and his use of "divine" terms (such as "holy", "judgement", and "absolution") to name his special techniques.

However, beneath his calm exterior, Fused Zamasu is just as unstable as his components, if not more so; according to Gowasu, this is the result of Zamasu's obsession and hatred with the contradiction between gods and mortals. He immediately flies into an overwhelming fury when Trunks and Vegeta briefly overpower him in their beam struggle, despite suffering no damage from the deflected attack, and his rage only grows when Goku manages to actually harm him with God Kamehameha and Kaio-ken. After having the right half of his body harmed, and being mutated by the Light of Justice, Fused Zamasu becomes more unhinged and maniacal, prone of furious outbursts. This is due to the fact that his physical body is deteriorating and the conflicting of the souls of the immortal Future Zamasu and mortal Goku Black that make up his form. By the time he engages Vegito and Future Trunks, Fused Zamasu is reduced to insane and enraged screaming and furious declarations of godhood, ironically becoming just as destructive and violent as the mortals he wishes to exterminate. In the manga, however, he retains his arrogance, openly gloating and overjoyed at his power. Although he does get angry at Gowasu for neglecting to mention that a permanent fusion can only be achieved by those officially designated as Supreme Kais. Similarly, upon Vegito defusing, he also calls Goku and Vegeta out for using the sacred treasure of the Gods.