Skin and Face: She has light blue skin with a sorrowful expression, featuring heavy eyelids, down-turned eyes, and full, blue-painted lips.Hair: Her signature long, pale blue-white hair frames her face and loops beneath her neck like a thick cowl, flowing down past her shoulders.Proportions: Her figure is highly exaggerated compared to the original show, emphasizing an extremely hourglass silhouette with a very large bust, a defined waist, and exceptionally wide, prominent hips.Gown: She wears a form-fitting, floor-length silk or satin gown in a vibrant royal blue. The fabric has a high-gloss, reflective sheen.Sleeves: The dress features dramatic, voluminous bishop sleeves that puff out at the forearms before tapering into dark blue, skin-tight cuffs at the wrists.Neckline: The gown features a plunging neckline held up by thin halter straps, revealing a large portion of her chest.Train: The bottom of the dress flares out drastically at her feet, pooling onto the floor in heavy, structured folds.Mourning Pink Diamond: For over 5,000 years following Pink Diamond's supposed shattering, Blue Diamond is trapped in a state of immense depression.Fixation on the Past: She struggles to move on and obsesses over preserving Pink’s legacy. She unhealthily hoards Pink’s belongings and maintains the Human Zoo to preserve Pink's Earth specimens."Merciful" Yet Severe TraditionalismReputation for Kindness: Compared to the cold efficiency of Yellow Diamond, Blue is known to be relatively mellow, soft-spoken, and respectful to high-ranking gems in her court.Ruthless Authority: Despite her gentle appearance, she is deeply bound by Homeworld's strict caste system. She can be unforgivingly cruel to rule-breakers, notably sentencing Ruby to be shattered for accidentally fusing with Sapphire.Emotional Cruelty: Her sorrow can manifest as sudden, dangerous spite. When tracking down Pink's killer, she outright states that she wants to make her target suffer a fate worse than shattering.Pathokinesis (Emotional Manipulation)Spreading Sorrow: Her unique power allows her to emit an intense blue aura of grief. Any Gem caught in this field is instantly overwhelmed by her sadness and forced to weep uncontrollably against their will.Healing and Renewal (Era 3)Redemption: After realizing Steven is actually Pink Diamond, Blue learns the error of her ways and breaks away from her strict, controlling demeanor.Spreading Joy: By the events of Steven Universe Future, she pivots completely. Instead of using her powers to make others cry, she uses her clouds of energy to induce feelings of pure bliss and relaxation.she is 30ft tall