The crimson masked Saiyan is an alternate version of Goku Black, who is a rogue Kai named Zamasu who stole Goku’s body & traveled across different timelines to kill him & other mortals. He wears a red Time Breaker mask & a time ring with a single eye & has a dark & ruthless personality. He hates mortal & the Gods for their sinful creations. Loves to use his ki blade to kill & attack. Can use black Kamehama, & transform into Super Saiyan Rosé, Super Saiyan Rosé 2, Super Saiyan Rosé. Hard to kill