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This article is about the artificial intelligence. You may be looking for the facility she manages.

Welcome, Pink Diamond.
Steven Universe: Ah, no, I'm Steven Universe.
Welcome, Steven Universe. I am Shell, your guide to The Reef!

—Shell, "Volleyball"

Shell is an A.I. unit that resides in the Reef and is the primary antagonist of the episode "Volleyball". She attempts to heal Pink Pearl's crack by rejuvenating her and Pearl. After they fuse into Mega Pearl to escape, she then attempts to kill the newly formed fusion and Steven. They escape Shell and destroy her security system.

Personality

Coded to act as a guide for possessors of Pearls, Shell is, at first, soft-spoken and helpful to Steven, Pearl, and Pink Pearl, as they walk through the facility of the Reef in search for a means to heal Pink Pearl's cracked eye. Once Steven loses his temper, however, Shell turns against the two Pearls and acts in harsh ways to "fix" them, locking them in an oyster and attempting to rejuvenate them, even as Steven pleads for her to stop. This showcases how Homeworld and those who programmed Shell used to be, as she retains the characteristics of a authoritative government. The A.I. is not programmed to recognize fusions; upon the formation of Mega Pearl, Shell becomes even more aggressive, believing her to be an unknown entity, and activates her defense system to intercept and capture her. Shell is ultimately turned off by Steven.

Abilities

Shell is programmed to be both a guide and a guardian to the Reef, being in full control of it. She can light up paths indicating the way toward a room, offer information to visitors, scan Gems with sensors, and rejuvenize rebellious Pearls — all to meet the owner's wishes.

In her position as a keeper, she can activate a defense system to attack unauthorized personnel. When it is initiated, the facility becomes weaponized: the doors are locked, and Shell utilizes laser beams, stretching ropes, and panels to prevent any intruder from leaving. Despite this, her activation panel can still be accessed and used to shut her off.

History

"Volleyball"

Shell is first heard when Steven presses a hand sensor at the Reef. This notifies Shell, who takes him, Pearl, and Pink Pearl on a tour through the facility. Eventually, she attempts to fix the crack on Pink Pearl's face, but fails. She explains that there is nothing wrong with the gemstone, so the crack is lingering due to psychological reasons. Later, when Pearl and Pink Pearl start arguing, Shell apologizes to Steven for their bad behavior, calling them defective and attempting to rejuvenate them.

When the two Pearls fuse into Mega Pearl, Shell does not recognize the new entity, and therefore attempts to neutralize her. Mega Pearl dodges and destroys most of Shell's security system. Shell, using panels, blocks off Mega Pearl from shutting down the defense system, but she simply throws Steven to do it in her steed, who succeeds.

Episode Appearances


Trivia

  • As an A.I., Shell can be categorized as both an object and a character.
  • Shell shares the same tone as Pearl when the latter asks Greg to identify himself in Steven Universe: The Movie.
  • Shell was never updated in the transitions to Era 2 or Era 3, showcased by the Era 1 symbol in her activation room and how she treats Pearls as objects bent to the wills of their owners.
  • As gems are implied to be sentient forms of A.I., it is possible that Shell is a modified gem, presumably a Pearl.


ve Characters in Steven Universe
Crystal Gems Human-Gem Hybrids: Steven

Unfused Gems: AmethystBiggs JasperBismuthLapis LazuliLarimarPearlPeridotRubySapphireSnowflake Obsidian
Gem Fusions: AlexandriteCrazy Lace AgateGarnetMega PearlObsidian (Rose Quartz Fusion)OpalRainbow QuartzSardonyxSugilite
Hybrid Fusions: Obsidian (Steven fusion)Rainbow Quartz 2.0Smoky QuartzStegStevonnieSunstone
Inactive Gems: Rose Quartz
Humans: Connie Maheswaran
Pets: LionPumpkinCat Steven

Homeworld Gems Unfused Gems: CombyEmeraldPebblesPeridotsSapphiresSpinel

Fusion Gems: MalachiteTopazZebra Jasper (fusion)Giant RubyRuby (triple fusion)Lemon JadeBluebird Azurite
Inactive Gems: Pink Diamond

Off Colors Unfused Gems: PadparadschaRutile Twins

Fusion Gems: FluoriteRhodonite
Humans: Lars Barriga

Other Gems (Formerly) Corrupted Gems: Angel Aura QuartzBig Bird • Biggs Jasper • BixbiteBlue Lace Agate • Cherry Quartz • Desert GlassEarth BeetleFlower MonsterGem Cave CreatureHeaven BeetleInvisible Gem Monster • Jasper • Lace Amethyst • Larimar • Lighthouse Gem Monster • Nephrite • Ocean JasperOrange SpodumenePlant MonsterPyramid Temple GemThe Slinker • Snowflake Obsidian • Tongue MonsterUnknown Giant Gem MonsterWater BearWatermelon TourmalineZebra Jasper (singular)Others

Other Gems: Minor GemsUnknown Gems (Morganite • Nephrite-XJ Cut-763 • Unknown Quartz Warrior • Blue Diamond's Court • Pink Diamond's EntourageUnknown Crystal Gems67 Elite CitrinesPyritesHessonites, Demantoids, and PyropesKyanites)

Gem Fusions: Cluster Gems (The Cluster)

Comic Gems: Ant Gem MonsterClock Tower GemFrozen FragmentGlass GhostInvisible Manta RayMole Gem MonsterMolluskMonster Lizard GemObeliskOld Book GemPlant MonsterPerils of PweepweeRainbow Cloud MonsterRed Bird Gem MonsterRed Eel MonsterScorching ShardSlime Gem MonsterSlug MonsterSnowbeastTentacle MonsterUnknown Giant Bird

Other Major Characters Humans: Greg UniverseSadie Miller
Recurring Characters Humans: Andy DeMayoBarbara MillerBill DeweyBuck DeweyBuddy BuddwickDante and Martha BarrigaDoug MaheswaranDr. Priyanka MaheswaranHarold SmileyJamieJaneJenny PizzaKevinKiki PizzaKofi PizzaMartyMr. FrymanMystery GirlNanefua PizzaOnionPeedee FrymanQuentin FrowneyRonaldo FrymanShepSour CreamSuitcase SamVidaliaYellowtailZoomans

Other: Baby MelonBlue CrabCactus StevenHolo-PearlMagic MossSteven Jr.Watermelon Stevens

Minor Characters Humans: The Best Diner in the World's WaitressEmpire City Wildlife Rehabilitation Center EmployeeGaryGreg's family (Aunt and Uncle • Aunt DebGrandfatherParents) • Hospital Employees (Dr. GeroDr. StrombergDr. West) JeffKhajima, Jaime, and BrandishMarty's RoadiesMayoral BodyguardsMike KrolOnion's Friends (Garbanzo • Pinto • Soup • Squash) • Patricia and DanielRickySabinaSteven's BabysitterSunshine JusticeWilliam Buford BuchananWilliam DeweyMinor Human Characters

Other: Blue CrabsButt LobsterCrystal BasiliskDogMask Island FishOnion's MouseOnion's SnakeParty GuyRaccoonSeagullsSnakeSteven The ThirdSusanMinor Animal Characters
Aliens: Beetle AliensBird Blob AliensUngulate AliensWorm AliensFlower-Like AliensMinor Alien Characters

Fictional Characters Cookie CatDogcopterMearlPizza JennyMinor Fictional Characters

Camp Pining Hearts: PaulettePercyPierre
Garnet's Universe: FoxmanHopperHoppyRingo
Golf Quest Mini: AceAce's Father
Li'l Butler: Li'l ButlerMr. MoneyMrs. MoneyDaughter Money • Dirtbike Money
Lonely Blade: Evil JanitorLonely BladeLonely Blade's Brother
Rose's Room: Cloud ConnieTiny Floating Whale
The Spirit Morph Saga: ArchimicarusLisaPlinkmanWind Lizard

Antagonists CentipeetlesCrab MonstersCrystal ShrimpDrill ParasitesElectric SkullsFryboRed EyeRobot Shooty ThingSmoke MonsterVine Monsters
Alter Egos Billy Bank AssetsChunk TruckConcrete HeatDashing Danny DooberHandsome Hank HackleschmidtHowl JonesLoch Ness BloggsterPurple PumaSea WaspShark-O-ManiaTiger Millionaire
Attack the Light Blue LightGreen LightIndigo LightOrange LightRed LightViolet LightWhite LightYellow Light

Groups: Light ArmyBlue Monsters • Green Monsters • Indigo MonstersOrange MonstersRed Monsters

Save the Light Hessonite • SquaridotHessonite's Citrines
Unleash the Light DemantoidPyrope
The Phantom Fable Fable • Lonely PearlJasper (Eyeball)
Groups Cool Kids • Crystal GemsCrystal Temps • "Famethyst" • Great Diamond Authority • Homeworld Gems • Hospital EmployeesOff ColorsOnion's FriendsPebblesSadie Killer and the SuspectsSecret Team • Steven and the Stevens • Water ClonesZoomansMinor Human CharactersMinor Animal CharactersMinor Fictional CharactersMinor Gem CharactersMinor Corrupted GemsSpeciesUnknown Gems
Gem Types Aquamarines • BismuthsDiamonds • GarnetsJades • Lapis Lazulis • Nephrites • Pearls • PebblesPeridots • Quartzes • Rubies • Sapphires • Topazes
ve Objects
Food & Beverages Bagel SandwichBeastChaaaapsCheese BallsColonel Kernel's Classic Creamed CornCookie CatDog-NutDrink UpDurian JuiceFantastic FriesFry BitsGuacolaHynes KetchupLion LickersMargarineNut-DogPizza BagelPop-PopPotato ChipsSadie's LunchesSpicy PretzelsSugar Shock Shut DownTogether BreakfastUbeWaflWhip It UpYummy Apple Juice
Magical Items Crystal Heart • Data Stones • Diamond Aura BottlesEternity ChaliceEvil Spirit ScrollFire SaltGarnet's GogglesGem BubblesGem PedestalsGem ShardsGemstonesGeode • Harmony Core • The HourglassLight PrismThe MirrorMoon Goddess StatueObeliskOld Book GemThe Perils of PweepweeShooting StarVolatile GemsWailing StoneWarp Pad
Musical Instruments Amethyst's DrumsConnie's ViolinGarnet's KeytarGreg's GuitarPearl's ViolinSteven's UkuleleWarp Whistle
Weapons The Axes of AgesBreaking PointConnie's SwordGem DestabilizerGem RejuvenatorGem WeaponsLaser Light CannonPearl's SwordsQuartizine TrioRose's Sword
Holding Items Cheeseburger BackpackHot Dog Duffel BagRose's ScabbardRose's Treasure ChestTiger Millionaire's Suitcase
Vehicles Earth: Andy's Plane • Dondai SupremoGreg's VanHandmade SpaceshipInflatable RaftJenny's CarHot 2 TotOnion's Moped • Steven's BikeS.S. MiseryThe Universe Mach 3

Homeworld: Aquamarine's ShipAttack PodDestiny DestroyerDiamond Palanquins (Blue Diamond's PalanquinPink Diamond's Palanquin) • Diamond Ships (Blue Diamond's ShipPink Diamond's ShipWhite Diamond's ShipYellow Diamond's Ship) • Emerald's Personal Shuttle • Escape PodGem Warship • Hessonite's Warship • Homeworld Dropship (Ancient Gem Colony Ship) • Roaming Eye
Crystal Gems: Gem DrillGem Sloop
Off Colors: Sun IncineratorStar Skipper

Rides The AppalachianHyper SpaceJelly JigglerThe TeacupsTsunami
Games Citchen CalamityGolf Quest Mini

Arcade Games: Chrono Panic 4Meat Beat ManiaPunch BuddyRace RushRoad KillerSkee BallTeens of RageVirtua Teens of RageWhacker ManWhacker Man Jr.

TV Shows Camp Pining HeartsCanine CourtCrying Breakfast Friends!I Can't Believe My Stepdad's My SwordKoala PrincessLi'l ButlerUnder the Knife
Books BrigandBuddy Buddwick's JournalCarrion Amongst The CloverFOINEHow to Talk to PeopleNOICEThe No Home BoysPassions of XanxorPretty HairstylistThe Spirit Morph Saga (The Unfamiliar Familiar)
Movies Dogcopter 3Evil Bear 2: Bearly Alive • Lonely Blade (Lonely Blade IVLonely Blade V)
Toys Bass Fish Toy • Water GunMinor Toys

Plush Toys: Master of Ceremonies Bear Bear • M.C. Bear Bear • Mr. Queasy • Peridot's Alien • Playful KittySir Bearington
Action Figures: B.O.Y.S.G.A.L.S. (Explorer Gal) • G.U.Y.S. (Dave Guy • Ranger Guy)
Props: Cluster PuppetGiant Cellphone PropJungle BucksWall Street Newspaper Prop

Machines Crystal Gem Machines: Pearlbot
Homeworld Machines: Gem SatelliteRed EyeInjectors (Attack InjectorsSpinel's Injector) • Shattering RobonoidsShell
Peridot's Machines: Crystal Gems: Attack DronesPeribotVisor Robonoids
Homeworld: Robonoids (Flask RobonoidsHand RobonoidPlug Robonoids)
Other Machines: Harmony Core Sentries • Robot Shooty Thing
Misc. Items Aquamarine's WandThe Armor of the FallenBeach City StageBlue Diamond's Personal EffectsConnie's Glow BraceletChalkboardCurrencyDiamond CommunicatorDuct TapeFryboGiant PennyGreg and Rose's PictureGreg's Music CollectionG.U.Y.S. DispenserHarpoon GunThe Heretic's AnguishLimb EnhancersLubitz Cardioid Condenser 680Metal MuttMr. Universe ShirtNietzche's BreakdownOld Gem PaintingOnion's Birthday TapePearl's TreePeridot's Voice RecorderPink Diamond's Personal EffectsPink Pearl's Ribbon WandReplicator WandRonaldo's PhoneRose Quartz's Video TapeRose's Battle FlagRose's PaintingSea PalsSpace Train to the CosmosSteven's Birthday SuitSteven's MugSteven's PhoneSteven's TVSteven's Video Game SystemsTag Team BeltTelescopeTemple GateTubeTubeT-Shirt CannonVIP(IZZA)Weirdstar.StreamYellow Diamond Signal Flare

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