We do not run or shout in these hallways!
Holly Blue Agate has a periwinkle blue complexion, pale lavender hair styled into two pointed side buns that are white, violet, and lavender, respectively, plump lips, and violet eyes with visible pupils. Her gemstone is located on the lower back of her head.
She wears a navy blue top with a high collar, a blue shawl with a darker blue collar-like pattern and a blue diamond symbol, royal blue pants, and white high-heeled jackboots that go up to her thighs.
A diplomatic blue Quartz. Like a boarding school for these miscreant Earth-Amethysts. Holly tries to keep them in line.
|—Holly Blue Agate's Concept Art|
Because the Gem hierarchy is what dictates Holly's attitude, her loyalty can be exploited by the higher-class and have her point at the lower-class for caused situations. This is why she blames the Quartz Gems from Earth under her management, giving off a false idea of defectiveness and incompetence. This flaw is what results in Holly Blue being convinced by Sapphire of various oddities that occur, thanking her precognition, and considering the quirks that the Crystal Gems would otherwise be caught for as irrelevant.
Like many Homeworld Gems, Holly is arrogant towards humans and does not acknowledge them as truly sapient beings, waving off Steven's speech as senseless babble, nor does she respond to any human's words despite sharing the same language. Furthermore, being in charge of Pink Diamond's Zoo, she only sees the keeping of the humans as a duty and cares nothing about the humans in captivity, seeing them as little more than animals.
Holly's adherence to the Gem hierarchy determines her behavior towards other Gems, treating those above her, like Sapphire and Blue Diamond with the utmost respect to the point of boot licking while she is haughty and even abusive towards Gems below her, like Pearl and the Quartz soldiers under her command. She values her place in the Gem hierarchy, as well as her position in the eyes of her superiors that she would rather hold her tongue than report to the Diamonds of the Crystal Gems successfully infiltrating and escaping the zoo under her command, and spare herself the embarrassment and other consequences of such a breach in security under her careful watch.
Holly Blue Agate checks up on the Amethysts that guard the Zoo entrance. She becomes frustrated that they were being unprofessional in front of a Sapphire and asked Sapphire to forgive them because they are from Earth. Holly Blue Agate is thrilled to discover that another human has been brought for the Zoo after millennia of nothing. Upon request, she agrees to give Sapphire and the Gems a tour of the facility, where she explains how Pink Diamond used to own the Zoo, and that, due to her "merciful and forgiving nature," Blue Diamond took over. Holly Blue Agate is annoyed by Ruby when she claims to have left the gravity engine on. Later on, two Amethysts run and shout at Holly Blue Agate in a hallway, leading her to scold them. She becomes surprised when they reveal that Blue Diamond is returning to the Zoo, so she makes sure that the Amethysts act professional, and orders them to escort Steven to the assimilation bay.
Holly Blue Agate is shocked to find all of her Quartzes (the "Famethyst") in the 'Quartz Room' after hearing the news that Blue Diamond returned. She orders them to get to their stations to look professional in front of Blue Diamond. Holly Blue Agate later escorts Sapphire to Blue Diamond and is taken back to see that Yellow Diamond is there as well. Afterward, Holly Blue is amazed that she got to witness two Diamonds at the same time, and goes on about how Yellow Diamond radiates a commanding presence which she respects. Holly Blue becomes livid to find Steven and Greg trying to escape, blaming her Quartzes for being incompetent. Garnet, Amethyst, and Pearl fight back and defeat Holly Blue Agate. She then swears to tell the Diamonds about the incident and have them shattered, only for Pearl to remind her of the potential consequences of letting the Crystal Gems into a maximum security facility right under her supervision, and to be advised to keep quiet over the incident to save herself embarrassment, or worse. Holly Blue Agate is left to mull over her failure.
Holly Blue Agate is briefly pictured during Steven's part of the song "Happily Ever After" alongside other Gem enemies.
Holly Blue Agate appears at the Zoo, angered by her Quartzes relaxing. She begins to complain, but stops instantly and slides uncomfortably away when she notices Steven.
Holly Blue Agate possesses standard Gem abilities. As a Quartz-type Gem, she is easily strong enough to deliver painful blows to other Quartz Gems. However, against multiple opponents such as the Crystal Gems, she can be easily dispatched.
- Electric Whip Proficiency: With the desire to discipline others, Holly Blue can summon a blue whip with electrical currents running down it. The whip appears to have the same durability as Amethyst's whip since Pearl's spear easily cuts both.
It's tragic that Pink Diamond's existence in this universe ended up being so finite, but what a selfless act for Blue Diamond to step forward and spend her own time and energy preserving this place in Pink Diamond's memory. It's a real testament to Blue Diamond's merciful and giving nature. Don't you think?
Right this way, Your Grand Clarity.
And I never expected to see Yellow Diamond in person. What a commanding presence. You can just feel strength and confidence radiating from her. Don't misunderstand me, of course. I'll always be in Blue's confidence, but if I had been made for Yellow, you wouldn't see me complaining.
|—"That Will Be All"|
I don't know why anyone trusts Rubies with those ships! This is what happens.
Do keep up, Pearl.
You'll have to forgive them. [Laughs] They're from Earth.
|1. "Kindergarten Kid":||Absent||14. "The Zoo":||Absent|
|2. "Know Your Fusion":||Absent||15. "That Will Be All":||Appears|
|3. "Buddy's Book":||Absent||16. "The New Crystal Gems":||Absent|
|4. "Mindful Education":||Absent||17. "Storm in the Room":||Absent|
|5. "Future Boy Zoltron":||Absent||18. "Rocknaldo":||Absent|
|6. "Last One Out of Beach City":||Absent||19. "Tiger Philanthropist":||Absent|
|7. "Onion Gang":||Absent||20. "Room for Ruby":||Absent|
|8/9. "Gem Harvest":||Absent||21. "Lion 4: Alternate Ending":||Absent|
|10. "Three Gems and a Baby":||Absent||22. "Doug Out":||Absent|
|11. "Steven's Dream":||Absent||23. "The Good Lars":||Absent|
|12. "Adventures in Light Distortion":||Absent||24. "Are You My Dad?":||Absent|
|13. "Gem Heist":||Debut||25. "I Am My Mom":||Absent|
|Steven Universe: The Movie:||Imagined|
|1. "Little Homeschool":||Absent|
|3. "Rose Buds":||Appears|
- Rebecca Sugar based Holly Blue Agate on Maggie Prescott, a character from the 1957 film Funny Face.
- In her early art concepts, Holly Blue had a single hair bun instead of two.
- Holly Blue Agate speaks in a Transatlantic or Mid-Atlantic accent, a combination of American and British English which was commonly used in American theatre and film in the early 20th century.
- Holly Blue's instrument that plays in her theme is confirmed to be a Synth Harpsichord by Aivi Tran from Aivi and Surasshu.
- During the song "What's the Use of Feeling (Blue)?" Yellow Diamond mentions that Agates are used to "terrify". Whether this means to terrify opponents on the battlefield or subordinates into submission is not made clear, but it could mean both.
- Holly Blue bears a mild resemblance to an unknown Gem appearing in "The Answer".
- Along with Bismuth, Carnelian, Emerald, Spinel, and Snowflake Obsidian, Holly Blue Agate is the sole individual of her Gem type to be seen in full detail.
|Holly Blue Agate's gemstone is located on the back of her head, just above her neck. It features an inverted kite-shaped facet and is shaped like a teardrop.|