Unlike the canon Steven Universe, Yellow Steven's powers are mostly offensive. But behind the Diamonds' backs, they fuse into Stevonnie and become a couple. In front of the Diamonds, she is Steven's best friend, Second in command, and most Elite Protector. He does, however, have a soft spot for Gem Warrior Connie. He commands his armies with an iron fist, and if anyone dares to stand against him, they are crushed. Like his mother, Steven cares for almost nothing but furthering the Gem Empire and conquering as many worlds as possible. Under Steven's rule, the Earth was turned into an extremely successful gem colony, producing several successful gems, and all life was put into zoos and gardens for Pink to look after. What Earth was turned into under Yellow Steven. The Temple was stormed, and all the Corrupted Gems were transported to Homeworld, where they were cured by the Four Diamonds' essence, judged on how useful they still were, and either reintegrated into Gem Society, Reset to their default settings, or immediately shattered.After being put in 'time out' for half a decade, she was reset and put back in power as a Diamond. Rose Quartz was found to actually be Pink Diamond in disguise, and was severely punished by her fellow Diamonds for both her treacher and for making them think she was dead.She is now a one-of-a-million servant to a certain Aquamarine in Blue's court. Pearl was deemed still useful, and was struck with a Rejuvenator Scythe to reset her back to her original factory setting.Steven found no use for a faulty Amethyst, and she was shattered by Jasper immediately.Garnet was poofed, and her Gems were bubbled, which would later be used to power a weapon for one of Steven's warriors.The Crystal Gems were captured and dealt with by Steven himself. They put up great resistance, but Steven's forces eventually overwhelmed what was left of the rebellion. He eventually set his sights on the planet that Pink Diamond failed to conquer, and discovered the Crystal Gems. He conquered many planets, turning lush worlds into lifeless husks and using their resources to create more Gems for the empire. Yellow Steven would follow in his mother’s footsteps and become one of the mighty diamonds in the great diamond authority. The other Diamonds were briefed by Yellow Diamond of the experiment, and they raised the new Gem-Human hybrid. The purpose of Steven’s existence was one purely for experiment. In this AU, it was Yellow Diamond instead who sacrificed her form for experimental purposes. In the original series, Rose Quartz (aka Pink Diamond) gave birth to Steven by sacrificing her physical form. Yellow Steven is the AU of Steven Universe from the show Steven Universe.

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