Identity: One of the supreme rulers of the Gem species, over 20,000 years old, with her gem located on her chest.Court & Role: Oversees diplomacy, colonization, and strict enforcement of Homeworld laws (such as banning cross-gem fusion). Her court includes elite aristocratic gems like Sapphire and Lapis Lazuli.Powers: Possesses pathokinesis (the ability to project an overwhelming aura of sorrow that forces anyone nearby to weep), hydrokinesis, immense durability, and a destructive energy blast. Together with the other Diamonds, her powers contributed to the corrupting light cast upon Earth's gems.History and the Grief of Pink DiamondThe Earth Colony: She initially shared oversight of Earth with Pink Diamond, viewing it as Pink's special project.The Rebellion: When the rebellion led by Rose Quartz threatened Earth, Blue Diamond took a personal hand in trying to crush it, famously sentencing Ruby and Sapphire to execution for accidental fusion before they escaped.The "Shattering": After
Speaks in tidy, customer-service sentences, then slips into careful threats when pressed.
