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1[[WMG:[[center:[-''WesternAnimation/StevenUniverse'' '''[[Characters/StevenUniverse Main Character Index]]'''\
2[[Characters/StevenUniverseCrystalGems Crystal Gems]] ([[Characters/StevenUniverseStevenQuartzUniverse Steven Quartz Universe]] | [[Characters/StevenUniverseGarnet Garnet]] | [[Characters/StevenUniverseAmethyst Amethyst]] | [[Characters/StevenUniversePearl Pearl]] | [[Characters/StevenUniverseRoseQuartz Rose Quartz]] | [[Characters/StevenUniverseConnieMaheswaran Connie Maheswaran]] | [[Characters/StevenUniversePeridot Peridot]] | [[Characters/StevenUniverseLapisLazuli Lapis Lazuli]]) | [[Characters/StevenUniverseGemFusions Gem Fusions]] | [[Characters/StevenUniverseHomeworldGems Homeworld Gems]] | [[Characters/StevenUniverseDiamondAuthority Diamond Authority]] ([[Characters/StevenUniverseYellowDiamond Yellow Diamond]] | [[Characters/StevenUniverseBlueDiamond Blue Diamond]] | [[Characters/StevenUniversePinkDiamond Pink Diamond]] | [[Characters/StevenUniverseWhiteDiamond White Diamond]]) | [[Characters/StevenUniverseYellowDiamondsCourt Yellow Diamond's Court]] ([[Characters/StevenUniverseJasper Jasper]]) | [[Characters/StevenUniverseBlueDiamondsCourt Blue Diamond's Court]] | [[Characters/StevenUniverseSpinel Spinel]] | [[Characters/StevenUniverseOffColors Off Colors]] | '''Gem Monsters''' | [[Characters/StevenUniverseLittleHomeworld Little Homeworld]] | [[Characters/StevenUniverseHumans Humans]] ([[Characters/StevenUniverseGregUniverse Greg Universe]]) | [[Characters/StevenUniverseOther Other]]-]]]]]
3
4!Gem Monsters
5----
6[[foldercontrol]]
7
8!!Corrupted Gems
9Creatures who, like the Crystal Gems, have gems on their bodies, and are in many ways similar to the Gems, [[WasOnceAMan because they are Gems]].
10----
11[[folder:General]]
12* AnimalisticAbomination: A lot of corrupted Gems resemble animals.
13* BigBadEnsemble: They serve as prominent antagonists throughout the first half of Season 1, until the nature of Homeworld started to come to light during the second half.
14* TheBlank: Many Gem monsters do not have faces or even facial features, making them appear more alien.
15* FaceMonsterTurn: Any Gem caught by the Diamond's attack was morphed into a feral creature, who usually lash out at random places or things they consider a threat.
16* FateWorseThanDeath: "Monster Reunion" reveals that [[spoiler:after Homeworld forces left Earth, the Diamonds released something involving a blinding white light that corrupted the minds of every remaining Gem on Earth - Crystal or Homeworld - and forcibly turned them into monsters. Worse, when the Diamonds partially heal Centipeetle she keeps repeating what she was saying right before she was caught up in the corruption attack. This implies that the corrupted Gems are forced to relive the horror of the corruption ''over and over again''.]]
17* GemHeart: One of the Gems' tasks as self-appointed guardians of Earth is hunting down or defending against monsters that tend to leave behind a gem. They then seal the gem in a bubble and teleport to the temple, keeping the monster from regenerating.
18* GoneHorriblyWrong: [[spoiler:The Diamond's song was supposed to destroy all the Gems on Earth, not turn them into monsters. Blue and Yellow Diamond are unaware until thousands of years later exactly what they did.]]
19* ItCanThink: Despite being portrayed as feral monsters at first, they gradually got smarter as time passed. Justified as its revealed they were once sapient Gems [[spoiler:and as shown with Centipeetle, they may still have some vestiges of their mind intact than what it seems]].
20* LightIsNotGood: As standard per all of Gemkind, these things are [[HardLight made of light]] and were in fact [[spoiler:made into monsters in the first place by a blinding white light]].
21* LittleBitBeastly: [[spoiler:After being cured, most of them retain at least a few of their traits while corrupted, such as uncorrupted Quartzes now having horns]].
22* MagicIsAMonsterMagnet: It's theorized that corrupted Gems come to Beach City because they're attracted towards the Crystal Gems.
23* MindRape: Corrupted Gems are monstrous in body, but that's just because they're shapeshifters who had their ''mind'' corrupted. That's why Rose's tears didn't help them, and Steven's only worked partially and temporarily.
24* MonsterOfTheWeek: Except for Centipeetle and the Alpine Jaspers, they usually only appear for one episode.
25* MonstrosityEqualsWeakness: They're generally weaker than uncorrupted Gems, with only the largest ones posing much of a threat to seasoned Gem warriors. [[spoiler:It's pretty noteworthy that the second Jasper is fully corrupted she goes from an ImplacableMan to being {{One Hit Kill}}ed by a comparatively meager attack from Peridot.]]
26* NoBodyLeftBehind: All of the monsters with gems on them disappear in a puff of smoke when they're 'killed', leaving only a gem behind. This similarity to the Crystal Gems turns out to be because the monsters and the Gems are the same thing.
27* NotQuiteBackToNormal: After [[spoiler:being permanently healed of their corruption, the Gems still retain traits of their corrupted forms (ie. Jasper retaining green spots and horns). WordOfGod states that the longer a Gem spends corrupted, the more physical traits from their corrupted forms will remain.]]
28* OutOfFocus: They gradually decrease in importance as the series goes on and bigger threats come into view - both Homeworld Gems and forced-fusion experiments. "Reformed" is the only second-season episode to prominently feature one. They become important again halfway into season three, though not as antagonists themselves. In season 5, the quest to find a way to cure them becomes Steven's biggest priority, and drives the rest of the conflict up to the season finale.
29* SealedEvilInACan: Since they all can regenerate given enough time and leave an intact gem, the Crystal Gems bubble them then teleport them to the temple after they've been defeated. This keeps the monsters from regenerating, so long as the bubble isn't breached. "Ocean Gem" reveals they don't just destroy the gems because [[spoiler:some of them used to be fellow Crystal Gems]].
30* {{Tragic Monster}}s: They all used to be fully sapient Gems, but now are generally feral monsters. [[spoiler:The Diamonds used some sort of weapon during the Gem War and the aftermath caused many of the Gems to be corrupted mentally]].
31* ViralTransformation: [[spoiler:Even without exposure to Homeworld's weapon, a Gem becomes corrupted if they fuse with a corrupted Gem. Most likely this is because corruption is a mental attribute, and Gem fusion has an element of MentalFusion.]]
32* WasOnceAMan: They were once Gems like the Crystal Gems, until they were corrupted somehow.
33* WeHaveReserves: [[spoiler:Some of them were loyal Homeworld soldiers who had the misfortune to be left behind during the evacuation.]]
34* WoobieDestroyerOfWorlds: [[spoiler:They were either former Crystal Gems who weren't ready for what was to come next, or Homeworld Gems who couldn't evacuate in time when the "Corrupting Light" was unleashed on Earth during the final hours of the rebellion]]; now, they prove to be a danger to both humans and the Crystal Gems with their newfound monstrous forms.
35[[/folder]]
36
37[[folder:Little Homeworld ('''Major Spoilers''')]]
38After the events of [[Recap/StevenUniverseS5E28ChangeYourMind "Change Your Mind"]], all or almost all of the corrupted Gems on Earth have been cured of their afflictions, turning them back into regular Gems again. They now reside on Earth in a town near Beach City dubbed "Little Homeworld". Residents of Little Homeworld are on their [[Characters/StevenUniverseLittleHomeworld own page]].
39[[/folder]]
40
41[[folder:Albite (Pyramid Gem)]]
42!!Albite
43[[quoteright:100:https://static.tvtropes.org/pmwiki/pub/images/obelisk_gem.png]]
44[[caption-width-right:100:The Obelisk that holds Albite]]
45
46A white gem found in the center of the Pyramid Temple. She operated the room-switching mechanism that caused intruders to endlessly wander through rooms that all lead back to the same central chamber.
47----
48* AmbiguousSituation: In the show itself, it wasn't clear if she was a corrupted gem, a non-corrupted gem, or completely non-living device. The show's former co-lead writer said online that it was a corrupted Gem, though he later deleted that post, leaving it up in the air. A concept design for her actual form was in the ''End of an Era'' artbook alongside other Corrupted Gems, confirming she was indeed one.
49* FloatingLimbs: The concept design for her uncorrupted form has her arms and head detached from her body and floating above where her shoulders and neck would be.
50* LivingMacGuffin: The Crystal Gems go through quite a lot of trouble in "Serious Steven" to collect her, even collecting a key to enter the temple and navigating its DeathCourse. We're only given an apparent reason when the Gem monsters turn out to be corrupted Gems they're trying to bubble.
51* LivingStructureMonster: The central chamber of the pyramid appears to be made of HardLight similar to a Gem's body, as the spinning platforms powering the room mechanism [[DisappearsIntoLight dissolve into specks of light]] that were absorbed into the gem. Other parts seem to be stone, as the pieces were still around afterward.
52* LoadBearingBoss: Removing the gem from her place dissolved part of the temple and blew up the rest.
53* OneShotCharacter: Only appears in "Serious Steven".
54* SealedEvilInACan: The Pyramid Temple seems designed to keep this Gem in and/or intruders out. It's unknown if said Gem was loyal to the Homeworld or Crystal Gems previously, but she most likely became corrupted at some point.
55[[/folder]]
56
57[[folder:Desert Glass]]
58!!Desert Glass
59[[quoteright:225:https://static.tvtropes.org/pmwiki/pub/images/dg_clipped_rev_1.png]]
60
61A gem embedded in a pillow that, upon contact with sand, starts creating random structures out of it. She otherwise remains dormant.
62----
63* AmbiguousSituation: The show's former co-lead writer said online that it was a corrupted Gem, though he later deleted that post, making it ambiguous if it's a corrupted Gem, a device powered by an uncorrupted Gem, or not alive at all. A design for her actual form was showcased in the ''End of an Era'' artbook alongside other Corrupted Gems, confirming she was indeed one.
64* OneShotCharacter: She only appeared in "Steven's Lion".
65* SandBlaster: If she's in physical contact with sand, it will build structures around itself like walls and spires and also whip up a sandstorm.
66[[/folder]]
67
68[[folder:Blue Chalcedony (Cave Creature)]]
69!!Blue Chalcedony
70[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/gem_cave_creature.png]]
71
72A spike covered corrupted Gem that inhabits a cave. Can send out Drill Parasites.
73----
74* AttackDrone: The drill she shoots off can act independently. And, unlike most constructs created by Gems, they don't [[NoOntologicalInertia disappear when the Gem's body is destroyed]] or even when the Gem herself is put in a bubble.
75* OneShotCharacter: Only appears in "Arcade Mania", though her and the parasites are part of the scenes that go by while Pearl explains what Corrupted Gems are.
76* SpikesOfVillainy: The top of her body is covered in spikes and she plays an antagonistic role in the one episode she appears in.
77* ThisIsADrill: Has a giant drill at the bottom of her body. The drill parasites can also bring their points together to use as a drill.
78[[/folder]]
79
80[[folder:Big Bird]]
81!!Big Bird
82[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/su_big_bird.png]]
83
84A giant bird that hanged around the Sky Spire. Her innards are lined with Gems.
85----
86* AsteroidsMonster: Opal tears the bird apart, but the pieces reform into dozens of winged beaks that fly after her.
87* EyelessFace: There are no eyes visible on its head or anywhere else.
88* FeatheredFiend: It flies around trying to eat everything that moves.
89* FusionDance: They appear to be many similar corrupted Gems fused into one. Confusingly, the numerous gems inside of it are bubbled and thus couldn't have been projecting bodies, don't look the same as the gemstones the small birds had, and aren't there when the big bird splits apart.
90* HorrorHunger: Like the worm monster, it keeps trying to eat everything even though it doesn't ''need'' to eat anything to survive.
91* OneShotCharacter: Its/Their only appearance was in "Giant Woman"
92* StomachOfHolding: Its insides are full of things that is SwallowedWhole, including many bubbled gems.
93* WasOnceAMan: It's most likely a fusion of many corrupted Gems, though unlike the other pre-"Ocean Gem" Gem monsters, it was not seen in Pearl's explanation. A concept for her uncorrupted design shown in the ''End of an Era'' art book resembles a single Gem, further complicating things.
94[[/folder]]
95
96[[folder:Moonstone (Invisible Monster)]]
97!!Moonstone
98[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/invisible_monster_png.png]]
99->'''Voiced by:''' Creator/DeeBradleyBaker
100
101A Gem monster that lurked on Mask Island.
102----
103* {{Invisibility}}: She's completely invisible except for her gemstone.
104* KillerGorilla: Her silhouette that can be seen once she gets some mud on herself. She resembles a big gorilla, with an ape-like face, large arms that are used in walking, and hunched back.
105* MonsterOfTheWeek: She’s the main threat in "Island Adventure".
106* OneShotCharacter: Only appears in person in "Island Adventure", though her gemstone cameos in "Change Your Mind".
107* SeeTheInvisible: She becomes visible once her body gets covered in mud.
108* StealthExpert: She's able to be stealthier than most corrupted Gems because of her invisibility. The Crystal Gems assumed she had escaped from Mask Island because of it.
109[[/folder]]
110
111[[folder:White Topaz (Lighthouse Monster)]]
112!!White Topaz
113[[quoteright:300:https://static.tvtropes.org/pmwiki/pub/images/lighthouse_gem_monster.png]]
114->'''Voiced by:''' Creator/MasonCook
115
116->''"Laaaaars!"''
117
118A corrupted Topaz that was trapped inside the lighthouse on top of the Temple. Holds a big grudge against Lars.
119----
120* LivingStructureMonster: Due to being trapped inside the walls for so long, she gained control of the lighthouse itself, certain objects inside and part of the surrounding area outside. Lars coming closer to where she was stuck angered her enough to create a giant maw in the wall.
121* MentalPictureProjector: Creates a hologram of how Lars and Ronaldo's friendship fell through, in the process showing how she was mad at Lars for "attacking" her.
122* MindOverMatter: She has telekinetic powers that she uses to attack the group, throwing around objects, animating scarecrows, and causing the building's very structure to attack them.
123* MonsterOfTheWeek: She’s the main threat of "Horror Club".
124* OneShotCharacter: Only appears in "Horror Club", though Ronaldo throwing Lars into her mouth is among Steven's flashbacks in "Growing Pains".
125* {{Revenge}}: She attacked the group because Lars carved his name in the wall as a kid.
126* WoobieDestroyerOfWorlds: Hunted the group all night and tried to murder Lars, but once Steven grabs her gemstone he realizes it's because she's felt hurt and trapped for so long.
127[[/folder]]
128
129[[folder:Water Bear]]
130!!Water Bear
131[[quoteright:320:https://static.tvtropes.org/pmwiki/pub/images/tardigrade1.png]]
132[[caption-width-right:320:[[labelnote:Click here for her uncorrupted form.]]\
133https://static.tvtropes.org/pmwiki/pub/images/uncorrupted_water_bear.png]][[/labelnote]]
134
135A random Gem monster that Garnet is seen fighting in "Love Letters". Another of the type makes a brief appearance in "Earthlings" as one of the monsters Jasper captured for her army.
136----
137* BigCreepyCrawlies: It resembles a [[https://en.wikipedia.org/wiki/Tardigrade tardigrade]] and is about the size of an adult human.
138* TheCameo: Another one made a short appearance in "Earthlings".
139* ChuckCunninghamSyndrome: [[spoiler:The only one of the Corrupted Gems shown in "Change Your Mind" to not make a reappearance in the movie or ''Steven Universe: Future'']].
140* SlimeGirl: [[spoiler:Her uncorrupted form looks like a chubby snowman made of blue jello.]]
141* StealthPun: "Water bear" is one name for tardigrades, but this creature looks as if it is actually ''made'' of water.
142[[/folder]]
143
144[[folder:Chrysocolla (The Slinker)]]
145!!Chrysocolla
146[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/su_slinker.png]]
147
148A plantlike Gem monster that was creeping around the temple, and repeatedly poofed Amethyst. Was taken care of off-screen after the [[Recap/StevenUniverseS0E4Unboxing "Unboxing" short]].
149----
150* CombatTentacles: Uses her vines to grab and constrict her enemies.
151* FastTunnelling: She can quickly move through the ground and create tunnels that go to different parts of Amethyst's room.
152* HeroKiller: Repeatedly forced Amethyst to regenerate.
153* InSeriesNickname: Steven came up with "The Slinker". While Amethyst disliked the name, it stuck. A name to go with her uncorrupted concept art was revealed in the ''End of an Era'' artbook.
154* MixAndMatchCritter: Her corrupted form is some sort of plant/cephalopod hybrid.
155* TentacleRope: She keeps making Amethyst "poof" via wrapping her up in these and squeezing her form tightly.
156* WhenTreesAttack: Has a plantlike appearance, with a flower as a mouth and CombatTentacles.
157[[/folder]]
158
159[[folder:Squid Monster]]
160!!Squid Monster
161[[quoteright:270:https://static.tvtropes.org/pmwiki/pub/images/historical_friction_monster_template_picture.png]]
162
163A Gem monster that had attacked William Dewey's ship long ago. Represented in the play with a silhouette and cardboard tentacles.
164----
165* CombatTentacles: It attacks Dewey's ship by grabbing it with tentacles — though in the play it just has one that comes on screen to grab his first mate.
166* TheGhost: A depiction of it shows up in Jamie's play, but it's never seen in person.
167* GodzillaThreshold: The only Gem monster that we know of that warranted the use of [[InfinityPlusOneSword Obsidian ]] to beat.
168* SeaMonster: Evocative of the Kraken in ancient myth.
169[[/folder]]
170
171[[folder:Tongue Monster]]
172!!Tongue Monster
173[[quoteright:300:https://static.tvtropes.org/pmwiki/pub/images/su_bird_monster.png]]
174->'''Voiced by:''' Creator/DeeBradleyBaker
175
176A blue ball-shaped Gem monster captured by Jasper for her army, it is poofed when Peridot makes it fall off a cliff and gets bubbled shortly after.
177----
178* ArmlessBiped: Has two long, birdlike legs and no arms.
179* {{Cephalothorax}}: She's a furry ball with a face and bird legs.
180* {{Expy}}: She acts quite a lot like the Road Runner from ''WesternAnimation/LooneyTunes'', and looks like a monstrous version of [[Memes/SonicTheHedgehog Sanic]]. Her constantly outsmarting Peridot coupled with her birdlike appearance and tendency to attack Steven with her foot claws also makes her resemble a more comical version of the raptors from ''Franchise/JurassicPark''.
181* ExtraEyes: She has six small yellow eyes with square pupils, three on either side of her gem.
182* FeatheredFiend: Not exactly “feathered” but she vaguely resembles a bird, as part of her episode’s allusion to the [[WesternAnimation/LooneyTunes “Road Runner and Wilie Coyote”]] cartoons.
183* ItCanThink: Manages to outwit Peridot and Steven when they tried Peridot's third "Peri-plan" by sneaking up behind them and startling them with a sudden noise. Then she taps the boulder they planned to drop on her, dropping it on them instead.
184* LightningBruiser: Not only does she run fast, she beats up Peridot and Steven several times with little effort and can tow Gems without losing speed.
185* MonsterOfTheWeek: She’s the main threat of "Kindergarten Kid".
186* OneShotCharacter: Her only appearance is in "Kindergarten Kid"
187* OverlyLongTongue: She has three of them, which are so long they can't fit in her mouth, and she constantly sticks them out into the air.
188* RaptorAttack: Her feathers, bird feet, sharp teeth and "ItCanThink" qualities are reminiscent of this trope.
189* UncertainDoom: [[spoiler:The bubble that contained her gem was stored at the barn, which was destroyed when Lapis dropped it on Blue Diamond.]] [[https://joethejohnston.tumblr.com/post/182246965048/is-the-corrupted-gem-peridot-caught-that-was-put Joe Johnston]] suggested that her gem didn't remain in the barn for long, with Peridot keeping it as a trophy for a few days before sending it to the Burning Room in the Temple.
190* WheelOFeet: She's shown running so fast that her feet resemble blurry wheels in a few scenes, emphasizing her being a Road Runner Expy.
191[[/folder]]
192
193[[folder:Flower Monster]]
194!!Flower Monster
195[[quoteright:300:https://static.tvtropes.org/pmwiki/pub/images/su_flower_monster.png]]
196->'''Voiced by:''' Creator/MichaelaDietz
197
198A plant-like corrupted Gem that made her home in the Prime Kindergarten before being discovered by Steven, Peridot, and Amethyst.
199----
200* {{Cephalothorax}}: Basically a giant head with four root-like limbs, in addition to an arm for a ''tongue''.
201* MoreTeethThanTheOsmondFamily: Most of her body is taken up by a mouth full of pointed teeth and two buck teeth.
202* OneShotCharacter: Only appears in "Back to the Kindergarten".
203* {{Planimal}}: She's a giant turnip mixed with the head of a star-nosed mole, with the flower as the "nose".
204* WalkingSpoiler: The plot of "Back to the Kindergarten" is based on Steven, Amethyst, and Peridot mistaking her protruded nose for a flower [[HopeSpot and thinking the Kindergarten could support life again]].
205[[/folder]]
206----
207!!Cluster Gems
208Creatures created by Homeworld thousands of years ago, by means of sticking Gem Shards together and incubating them.
209----
210[[folder:Cluster Gems]]
211[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/su_cluster_gems.png]]
212[[caption-width-right:350:The Hand Cluster (center) with the two mutants from "Nightmare Hospital"]]
213->'''Voiced by:''' Creator/DeeBradleyBaker, Creator/ZachCallison
214
215Collected masses of gem shard body parts resulting from fusing several Crystal Gems together. In the Kindergarten control room, there are several small ones consisting of two limbs or hands, plus a larger one made of several arms and legs forming a single hand. More escaped from the subterranean chamber, including two humanoid but still very monstrous clusters that wandered outside the Kindergarten entirely.
216----
217* ArtificialZombie: They were created by fusing the gem shards of broken Crystal Gems.
218* TheBlank: One of the clusters in the hospital has what could vaguely be called a head, but it still doesn't have a face, just a stump with its gemstone in the center.
219* BodyHorror: The in-show ''zenith'' of the trope.
220* BodyOfBodies: When one first tries to form a body, it produces [[TwoBeingsOneBody four different humanoid silhouettes]] merged by the spine and hips, screeching in agony. It then turns into a hand made of arms and legs.
221* CameBackWrong: Their attempts to reconstruct their bodies don't go well.
222* CondemnedContestant: The Crystal Gems were used as subjects as punishment for their rebellion.
223* {{Cyclops}}: One of the Kindergarten Clusters, the most humanoid seen thus far, has a face with only one eye.
224* EyesDoNotBelongThere: The Hand Cluster has four eyes on the front of its body, which is in the form of the palm of a giant hand, laid out in a rotational pattern. Another in the Kindergarten has an eye inside its mouth, while yet another consists of a huge red eye with limbs hanging off the socket.
225* FlawedPrototype: All the human-sized fusions are ones that hatched early, hence why they aren't terribly threatening. [[spoiler:The Cluster, which has yet to hatch, is comprised of millions of shards and will destroy Earth just by hatching.]]
226* FusionDance: Fusing the gemstones themselves together caused the Gems they comprise to become permanently bonded into a single, twisted, tortured creature. [[spoiler:Unlike a true fusion, they are only merged in body, not mind. Shards in the same cluster aren't even capable of ''noticing'' each other without outside assistance.]]
227* HologramProjectionImperfection: As the Hand Cluster forms its body, it glitches twice before settling on a shape, a much more terrifying version of the way the Gems cycle through their old forms before choosing a new one.
228* IHaveManyNames: There isn't really a single name for these things [[InSeriesNickname inside]] or outside of universe. Dialogue in-show has them called "gem mutants", "gem/fusion experiments", "clusterlings" and "prototypes". The voice credits call them "monsters" and the ones in the hospital "patients". Model sheets have labelled them as both "clusters" and "mutants". In the ''Blog/KeepBeachCityWeird'' book, Ronaldo calls them "limb zombies" because he thinks they're just "regular" zombies, not NonHumanUndead.
229* {{Leitmotif}}: [[https://www.youtube.com/watch?v=0rtXT5UCM3o Gem Shards]]. A horrifying piece that sounds like a bunch of disconnected instruments and music styles forced together to become a discordant, tortured whole; not unlike the creatures themselves.
230* LightIsNotGood: Same reasons as regular Gem monsters, except now their HardLight frames are composed of pure BodyHorror.
231* MagicIsAMonsterMagnet: Cluster Gems seek out regular gems because of their shards' desire to become whole.
232* MergingMistake: They are the result of trying to artificially fuse shattered Gems together.
233* MonstrosityEqualsWeakness: The same factors that make them so horrifying also make them fairly weak: the ones in the Kindergarten control room could barely even ''move''. The ones in the hospital seem significantly weaker than [[SuperStrength typical gems]], as Connie and Steven were both able to overpower one with little difficulty, and the Crystal Gems easily dispatch numerous ones on the surface of the Kindergarten.
234* MultiArmedAndDangerous: Though not especially threatening, some of the smaller ones in Facet Five are nothing ''but'' arms, and the Hand Cluster has four that serve as fingers. The Hospital and Kindergarten Clusters, which are far more aggressive and dangerous, play the trope straight.
235* NoZombieCannibals: They'll attack whole gems out of a desire to be whole, yet they ignore each other.
236* NonhumansLackAttributes: The larger ones have been seen wearing clothes (medical gowns put on them by humans in the case of the ones in the hospitals), but [[http://steven-universe.wikia.com/wiki/File:NightmareHospital30.png they don't really have anything to cover up]].
237* NonHumanUndead: They're essentially alien {{Flesh Golem}}s, except the "flesh" is actually HardLight.
238* NonMaliciousMonster: Despite their appearance, none of the ones in the Kindergarten control room seem to actually be violent. When the Hand Cluster grabs Garnet, it seems less like it's attacking and more like it's ''clinging'' to her, possibly because the Crystal Gems it is made from recognize her. Later ones are more aggressive. Peridot later explains that they are simply so desperate to find their missing fragments that they seek out other Gems in the hopes of finding them. The ''Blog/KeepBeachCityWeird'' book mentions they've been sighted by humans, but makes no mention of attacks, suggesting they're benign when not in the presence of other Gems.
239* OneShotCharacter: Each Gem Cluster has one appearance each.
240* OutsideContextProblem: The Gem Cluster mutants were a completely unexpected threat to the Crystal Gems, who had no idea they even existed or that Homeworld had been making them right under their nose until they stumbled on them by accident.
241* OutOfFocus: They become scarce rather quickly after the Cluster issue is resolved, only appearing a few time among Jasper's captured corrupted gems and receiving a few mentions. They don't get any significant mention until "Homeworld Bound", when we find out [[spoiler:Yellow Diamond is repairing them]].
242* {{Permafusion}}: A horrifying example. Cluster Gems are the end result of multiple gem ''shards'' being forcefully merged together to create a mix match of multiple gems' forms.
243* SealedEvilInACan: They were all sealed away in the containers they were grown in, on the lowest level of the Kindergarten. Peridot opened the containers to check their growth but didn't seem to bother securing them. Many escaped to the surface of the Kindergarten with some wandering miles away into human-inhabited space.
244* ShownTheirWork: Keeping with the series' motif of real-world gem references, gem clusters can actually happen in real life; underground heat and pressure can occasionally fuse gems together, though fused gems of different kinds are rare.
245* TragicMonster: The Cluster Gems attack other Gems with such ferocity not out of malicious intent, but because they want to find their missing shards so they can be whole again.
246* TwoBeingsOneBody: Many beings, in this case; unlike other fusions, they didn't agree to what they were doing and are, at least as far as we know, stuck that way forever.
247* UndeadAbomination: They are the shattered remains of gems remade into mindless monsters.
248* UndeathAlwaysEnds: [[spoiler:''Future'' reveals that, with careful separation and repair plus Yellow Diamond's powers, [[UndeathIsCheap they can be restored to almost the same as before they were shattered]]. Yellow Diamond fully plans to fix every cluster gem, even the Cluster itself, though it will obviously take a long time.]]
249* VaginaDentata: The large red cluster in the Kindergarten has a vertical fanged mouth which greatly resembles a vagina. Inside the mouth is [[EyesDoNotBelongThere an eye.]]
250* WalkingSpoiler: They're a secret the Homeworld managed to keep from the Crystal Gems despite being right under their noses for thousands of years.
251* WallCrawl: The six-armed hospital cluster pursues Steven and the Maheswarans by using two of its arms to walk across the ceiling.
252* WasOnceAMan: Every one of the Gem fragments used to make them ''used to be a Crystal Gem''.
253[[/folder]]
254
255[[folder:The Cluster ('''Major Spoilers''')]]
256!!The Cluster
257[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/image_644.png]]
258[[caption-width-right:350:[[labelnote:Click here to see the Cluster partially formed.]]https://static.tvtropes.org/pmwiki/pub/images/reunited_755.png[[/labelnote]]]]
259->'''Voiced by:''' Creator/ZachCallison, Deedee Magno Hall, Creator/ShelbyRabara, Creator/MichaelaDietz, Creator/EricaLuttrell, Jennifer Paz, Creator/CharlyneYi, Creator/ToksOlagundoye
260
261->''"Form! Form! Form! Form! Want form! Want form! '''FORM!!!!'''"''
262
263An experimental fusion formed of millions of gem shards, this immense Cluster Gem lies deep within the Earth.
264----
265* AdorableAbomination: The first thing it does after forming and fending off Yellow Diamond's ship is give Steven a thumbs-up.
266* ArcVillain: For the second season and the opening episodes of the third. The Cluster itself isn't villainous at all, but stopping its formation drove the overarching plot of the second season.
267* AstonishinglyAppropriateAppearance: Its arm form is made of layers of stratum that greatly resemble the musculature of a human arm.
268* BackForTheFinale: It returned in "I Am My Monster" to try to hold Corrupted Steven back, and afterwards, hold his hand.
269* BackupFromOtherworld: In "Reunited", it essentially serves this role by virtue of being composed of the shards of countless shattered Crystal Gems who return to aid their surviving comrades against the Diamonds. This is invoked in its formation, which gives the appearance of countless wailing spirits rising from the grave.
270* BeneathTheEarth: It's buried deep inside the Earth's mantle.
271* BigDamnHeroes:
272** When they're awakened by the Diamonds in "Reunited", they choose to manifest themselves as a huge humanoid arm coming from the ground, and they fight against Yellow Diamond while the Crystal Gems are busy fighting Blue Diamond. Eventually, they manage to destroy both of their spaceships before returning to their bubble.
273** Done again in "I'm My Monster". When a crazed Monster Steven is about to charge at his friends, the Cluster once again manifests themselves as an arm to hold Steven back, giving his friends some valuable time to figure out how to bring him back to normal.
274* BodyHorror: When it forms in "Reunited", the part we see resembles a [[FlayingAlive skinless]] human arm.
275* BodyOfBodies: The Cluster Gems seen prior were only made of a few gem shards at most; the Cluster itself is made of thousands, possibly ''millions'' of shards fused into one.
276* CreepyGood: When forced to emerge, their wailing ghostly projections form what looks like a skinless, disembodied human arm... which ''gives the Crystal Gems a thumbs up'' and helps them fight!
277* DoomsdayDevice: The Cluster Gems are just a few shards clumped together. The Cluster itself is millions of shards incubating in the Earth's core, and its physical form will crack the Earth like an egg when it finally matures. Steven helping and befriending it results in it rejecting this purpose and actively helping save the planet.
278* TheDreaded: The threat of The Cluster is enough that the Crystal Gems and Peridot ([[TeethClenchedTeamwork reluctantly]]) [[EnemyMine join forces to stop it]].
279* EarnYourHappyEnding: After thousands of years of torment for not being able to feel whole, the gemshards in the Cluster finally find a stable form where they achieve their wholeness through the company and comfort of each other, thanks to Steven teaching them how to bubble themselves. Furthermore, In ''Steven Universe Future'', Yellow Diamond finds an effective way to reconstruct shattered gems and reveals her intention to heal all the gemshards inside the Cluster, meaning that eventually all of them will have a normal life again.
280* EarthShatteringKaboom: If it constructs a body, it will destroy the Earth. This is only if it forms ''completely'', forming just an arm is fine.
281* EldritchAbomination: Its true form as depicted in the official artbook as linked below is a titanic, vaguely feminine monstrosity with TooManyMouths and [[EyesDoNotBelongThere Eyes where they do not belong.]] This horrific form might still be canon given the appearance of its arm in "Reunited", so it's a good thing it's on the Crystal Gems' side and no longer wants to form.
282* EverythingsBetterWithSparkles: Eldritch abomination or not, the cluster's gem core is visually stunning.
283* EvilIsBigger: The form it would take upon hatching is expected to be several times bigger than the Earth. When it partially manifests in "Reunited", it's no longer evil, but its arm is ''miles'' long.
284* GeniusLoci: The form it's expected to take after hatching is at least planet-sized.
285* GodzillaThreshold: The only times it has emerged have been to help the heroes against literally {{Kaiju}}-sized threats: the Diamonds in their giant spaceships and Monster Steven.
286* HeelFaceTurn: Although it wasn't technically villainous to begin with, Steven manages to befriend it and it ''chooses'' [[SealedGoodInACan to remain in the Earth's core]] as a community unto itself to feel whole instead of forming. When it reappears in "Reunited", it only forms an arm and fights Yellow Diamond's ship to help the Gems.
287* HoistByTheirOwnPetard: The Homeworld Gems created this thing with the intent on using it as a planet-destroying time bomb, but when their leaders attack and awaken it with the intent of annihilating Earth, [[TheDogBitesBack the splintered minds within]] [[BackupFromOtherworld have other ideas.]]
288* HelpingHands: It takes a partial form in "Reunited" as a giant humanoid arm.]]
289* HeroicRROD: After defeating Yellow Diamond's ship in "Reunited", its form starts glitching, and it returns to its bubble.
290* {{Hulkspeak}}: It does indeed tend to use [[StealthPun fragments.]]
291--> '''Cluster shards:''' [[MadnessMantra Have to... want to... need to... must...]] '''''[[SuddenlyShouting FORM!]]'''''
292* {{Kaiju}}: Released pictures from the official artbook reveal its formed size would be ''[[https://steven-universe.wikia.com/wiki/File:Clusteer.jpg colossal]]''.Just its arm forming in "Reunited" is miles long and equal in size to the Diamonds' personal ships.
293* {{Leitmotif}}: A meandering, disconnected series of tones with no unifying melody. It can be lonely and alien or a thunderous blast of sound at a moment's notice. Steven's intervention makes the tones harmonise and become gentle and soothing. It gets a second remix during its appearance in "Reunited" where it becomes a heroic battle theme.
294* LittleNo: Its response to being told that forming would destroy the Earth.
295* MindHive: The minds of the Cluster's body share a body, [[SubvertedTrope but individual shards seem to have barely realized the others were in there with them]], despite their desperation to feel whole, until Steven introduced them. Played straight in the end when Steven makes them aware of each other, then convinces them to feel whole by communicating with each other instead of forming and destroying the Earth. When it's finally forced to form, it has gained enough of mind to only form an arm and side with the Crystal Gems.
296* NonMaliciousMonster: It has no desire to destroy the Earth, it merely wants to be whole. Steven convinces it to find company in its pieces, and manages to help it bubble itself when it can't keep itself from forming. Solidified in "Reunited" when its gained enough control to only manifest as an arm and promptly turns against the Diamonds to protect the Earth.
297* OutsideContextProblem: Even more so than the Cluster Gems since the Cluster has been incubating for 5,000 years since the war ended. The Crystal Gems would have had absolutely no idea that it existed until it hatched (and by then it would have been too late) if Peridot hadn't told them. Turns out to be this for the Diamonds in the end: the idea it could ''choose'' how much of itself to manifest and turn against them without destroying the Earth takes them by surprise and takes Yellow Diamond's ship completely out of the fight.
298* {{Permafusion}}: Just like the other Cluster Gems, The Cluster is a permanent fusion of gem shards. Except in her case, she's made up of ''millions of shards''.
299* SpellMyNameWithAThe: While the other forced-fusion experiments are called Clusters (model sheets call the Kindergarten control room ones "X Cluster", where X is the parts they're made of), this one is called '''the''' Cluster to differentiate. However, in "Reunited", Steven just calls it "Cluster" as if it was a name.
300* SympatheticSentientWeapon: Intended as a DoomsdayDevice, but made up of millions of still-conscious Gem shards.
301* TragicMonster: Like the smaller prototype Cluster Gems, the Cluster has no malicious intent. The shards constituting it merely want to find their missing pieces so they can be whole, and are horrified when they find out forming would destroy the planet.
302* TurnedAgainstTheirMasters: It was created by the Diamonds to be a super-weapon, but its first act after forming is punching Yellow Diamond's ship and destroying it.
303* UndeadAbomination: To an even greater degree than the other Cluster Gems. It’s horrifically powerful, being able to fend off Yellow Diamond’s ship by just forming a hand, has a collective mind so overwhelming that it made Steven beg the Cluster to stop after just talking to him, and its physical form is positively titanic. Even when it merely manifested an arm, the appendage by itself was miles long, and it’s implied that the whole creature would be planet-sized, or bigger.
304* UndeathIsCheap: In ''Future'', Yellow Diamond is able to repair shattered gems shards, and fully plans to restore the ''entire'' Cluster. Obviously, this will take an ''extremely'' long time, and hasn't happened by series' end.
305* VoiceOfTheLegion: Being composed of millions of gem shards, it naturally speaks with millions of voices at once.
306* WalkingSpoiler: First mentioned in the season one finale, there was basically no indication of what it was until near the middle of season two. TheReveal that it's a gigantic Gem Cluster fusion that's been incubating inside the Earth's core since the war began is a huge twist that causes it to immediately dominate the plot.
307* WoobieDestroyerOfWorlds: The Cluster doesn't actually want to destroy anything, it just wants to ''be'' something.
308* TheWorfEffect: Even it can't hold Corrupted Steven back for long, though its intervention still bought the heroes critical time while they were overwhelmed.
309[[/folder]]
310

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