White Diamond from Steven Universe is the supreme ruler of the Gem race and the head of the Great Diamond Authority. She is an immense, towering, and blindingly bright figure with alabaster skin, star-shaped spiky white hair, dramatic black eyelashes, and a forehead gemstone.

Blue Diamond, a central antagonist-turned-ally in Steven Universe, serves as a tragic, monumental figure embodying deep sorrow, emotional projection, and eventual redemption. Originally a cold, mourning matriarch, her character evolves from punishing Homeworld's caste system to embracing emotional healing, using her powers to spread euphoria.

Yellow Diamond is a primary antagonist-turned-ally in Steven Universe and a supreme ruler of the Gem Homeworld as part of the Great Diamond Authority. She is the logical, cold, and authoritarian counterpart to the mournful Blue Diamond, executing the military expansion and colonization efforts of the Gem Empire with ruthless efficiency.