White Diamond

"Pink, there you are. Hello starlight, you certainly gave everyone a scare. They’re all just thrilled to see you safe and sound. As for this latest little game of yours, thank the stars it’s over. Did you have fun? Did you get everything out of your system? Good good, everyone’s so relieved. Welcome home, Pink."

- White Diamond welcoming Steven to Homeworld.

White Diamond is a character and is one of the main antagonists of the Cartoon Network TV series Steven Universe. She is a Homeworld Gem who is the superior to all gems including the Diamonds and along with Yellow Diamond, Blue Diamond and formerly Pink Diamond, formed the Great Diamond Authority.

Her mural was first introduced in the second season in the episode "It Could've Been Great", and reappeared in "Back to the Moon". Her first official appearance was in the Season 5 episode "Legs From Here to Homeworld".

She is voiced by Christine Ebersole.

Appearance
White Diamond is massive in size, towering even above the other diamonds and the largest gem fusions. She has spiky hair, shoulder pads similar to Yellow Diamond's, and is seen holding an orb in her hands. She wears a white dress and has shining sandals for footwear. Her pupils are ironically diamond shaped, and she has black lips and eyelashes. Her head is shaped like a large crown.

PErsonality
According to Blue and Yellow Diamond, White Diamond is very difficult to deal with. She has an apoplectic and temperamental demeanor, and apparently does not like to be embarrassed, as expressed by Yellow Diamond. Upon reuniting with "Pink Diamond", she is rather indifferent, smiling at Steven as if it were a regular meeting. When talking with Steven, she cut him off several times and did not allow him to speak, demonstrating her rude side and also implying that she was hiding a deep-seeded anger. White Diamond considers all of Pink Diamond's actions a fun game, and believes it was all something in her system.

It is probable that White Diamond rather violent, particularly with her pearl. This is evidenced with the huge crack on her pearl's head when she is first seen; it is very likely that the wound was recently dealt by White Diamond, since gems can alter their shapes and heal from any damage done to their projections and her pearl wouldn't show herself with such hideous disfigurement.

Abilities and Powers
White Diamond has the standard abilities of a Gem, those including: Enhanced condition, the ability to not age, and potentially, shapeshifting and fusion. However, she has a greater amount of power within, alongside Yellow and Blue Diamond, due to her status as a Diamond and member of the Great Diamond Authority.
 * Aura Projection: The Diamonds can project an aura around them that they can control, they can either radiate it from their entire bodies or emit it from specific parts of their bodies, usually their hands. Not much has been shown of White nor her aura, but during the Diamonds' final attack against the Crystal Gems, White's aura was shown around her hand as a solid white corona-like flare around it.
 * Corruption Induction: Though the attack was meant to obliterate the Crystal Gems on Earth after Pink's supposed shattering; Yellow, Blue, and White Diamond's collective powers instead corrupted the remaining Gems on Earth.

History
Nothing is known about White Diamond's past in Homeworld other than the fact that she is a presumed member of the Diamond Authority.

While she has yet to have an official debut in the series, or even be mentioned by name, White Diamond's mural can be first seen in "It Could've Been Great" at the Moon Base and again in "Back To The Moon."

In "The Trial," On Homeworld, a massive statue that resembles White Diamond's head and shoulders towers in the skyline.

In "Your Mother and Mine", White Diamond is briefly seen in the beginning of Garnet's flashback, along with other silhouettes of the diamonds. Later, her silhouette was shown again, along with Yellow and Blue Diamond's silhouettes, after the three have become aware of Pink Diamond's death caused by Rose Quartz. Her hand was revealed as she, Yellow Diamond, and Blue Diamond launched the Corrupting Light on Earth to end the Rebellion in retaliation.

She debuts in "Legs From Here To Homeworld". On Earth, Blue and Yellow Diamond explain to the Crystal Gems that White Diamond hasn't left Homeworld in eons (presumably the last time she did leave was when she participated in the Final Diamond Attack), and she would be unlikely to go to Earth. Despite this, Steven is determined to convince her to heal the corrupted gems and they head to Homeworld. On the way there, Blue Diamond states that White Diamond can be difficult to deal with, and Yellow Diamond says that she would do the talking, unless they wanted to be bubbled for the next few millennia.

Upon their arrival to Homeworld, White Diamond's pearl takes Steven to see White Diamond alone. When Steven is alone with White Diamond, she smiles at him and tells him how relieved everyone is of his safety. Steven attempts to say hello, but White cuts him off, saying how she hopes all of her actions on Earth were hopefully out of his system. She then welcomes "Pink Diamond" home, before putting Steven in a bubble and transporting him into a room that looks like Pink Diamond's Palanquin, with pink bubbles floating in the air.

Trivia

 * Due to the location of her gem on the forehead and the fact that Pearl of the Crystal Gems used to serve the Homeworld (as she claimed in the StevenBomb episode "Adventures in Light Distortion"), it is strongly implied that Pearl used to serve White Diamond before defecting to the Crystal Gems.
 * However, this theory is still in debate since Pearl has both Pink and White color in her body, and so, it is unknown whether she used to belong to Pink or White Diamond. Some theorize she was a gift from White to Pink.
 * It was revealed in "A Single Pale Rose" that Pearl belonged to Pink Diamond, but the following episode revealed Pearl was given to Pink Diamond.
 * Because of her Diamond symbol being on top of the other Diamonds, it is largely implied that she is the oldest and leader of the Great Diamond Authority, and by extension, the ruler of the entire Gem Race. However, it is stated by Peridot that the army of Homeworld obeys mostly to Yellow Diamond and she has complete authority over the military. Therefore, White Diamond is mostly equal to the other Diamonds.
 * Given the prominence of White Diamond's structure on Homeworld, it is possible she serves as Homeworld's head of government. It is shown that both Blue and Yellow afraid of her, showing she is the leader of the entire Gem races as well as her fellow Diamonds.