“ Oh great. You're both out? And you're fused again? Why? Fusion is just a cheap tactic to make weak gems stronger. Quit embarrassing yourselves. I've seen what you really are. „

~ Jasper to Garnet about what she thinks about gem fusion.   

Jasper is a major antagonist in Steven Universe. She serves as the main antagonist of the Season 1 finale episodes "The Return" and "Jail Break", as well as the second half of Season 3. She is a Homeworld Gem and the superior of Peridot. Sent to check on The Cluster.

Jasper is voiced by Kimberly Brooks.


Jasper is a bulky orange and red-striped Gem with an orange and brown suit. Similar to Amethyst, she has long white spiky hair. She has an aptly named jasper embedded on her nose which can summon a crash helmet she can use to charge at foes.


Jasper has a strict and serious personality as shown when she got upset at Peridot for seeing the enemies that stand against her. She also is very sadistic and manipulative as shown in the climax of "Jail Break" when she was going to attack the Crystal Gems.


Season 1

She first appears in "The Return" where she arrives to Earth with Peridot and Lapis Lazuli and is shown to be rather upset at the Gems that are standing in her way of conquering Earth. She then told Peridot to destroy them. Later, Steven saves the Gems with Rose's shield much to Jasper's surprise. After seeing this, Jasper proclaims that Yellow Diamond must see Steven. She then attempts to grab Steven, believing him to be Rose Quartz in disguise, but Garnet stands up to her and fights her. Unfortunately Garnet is severally injured by Jasper and retreats to her gems to heal, much to the shock of Amethyst, Pearl, and Steven. Jasper later knocks all the Gems out cold.

Later in "Jail Break", she puts Amethyst, Pearl, and Steven in prison on the ship. She is also revealed to have imprisoned the two gems that made up Garnet, Ruby and Sapphire. Steven later tries to convince Lapis to come with him and be free from prison but she refuses. At that same moment, he also frees Ruby and Sapphire and gets them together, causing them to regenerate and fuse into Garnet again. Garnet later fights Jasper while Steven frees Amethyst and Pearl. They later find Peridot, tie her up, and steer the hand ship back home to Earth. Garnet defeats Jasper and Peridot retreats to an area on Earth just as the ship crashes into the Gems's residence. Steven is able to save the Crystal Gems with his mother's shield. Unfortunately, Jasper survives the crash and is upset that she lost. She later notices Lapis and forces her to fuse with her which she accepts, turning them into Malachite. Lapis later takes control of Jasper and drags both of them into the ocean trapping Jasper in the process.

Season 2

She makes a cameo in the episode "Chille Tid". She appears in Steven's conciousness in the Malachite Realm, were she is still shackled by Lapis. She notices Steven and tries an attempt to attack him (presumably still believing him to be Rose Quartz), but is prevented by Lapis from doing so and dragged into the water with her.

Season 3

In "Super Watermelon Island", she finally gains control of the fusion Malachite and breaks free from the chains holding her down. She manages to manipulate Lapis with helping her fight Alexandrite.(a fusion of Garnet, Amethyst, and Pearl) But after help from the watermelon Stevens, is defeated and Lapis and Jasper seperate and after Jasper is carried out of the water, she falls into a huge crack made in the ground by the Cluster. Leaving her fate unknown.

In "Hit the Diamond", Yellow Diamond sends five Ruby soldiers to retrieve Jasper, due to failing her mission on Earth. It is revealed that she was considered the "leader" of the mission, much to Peridot's surprise. Peridot, unaware that her fellow Crystal Gems do not know Jasper's whereabouts, tells the Rubies that they know Jasper's location. Steven lies to the Rubies and tells them that Jasper is on Neptune.

In "Alone at Sea", Jasper follows Lapis while she is on a boat with Steven and Greg. Jasper makes multiple attempts to board the ship, such as pulling down and snapping the string off of the fishing rod to climb onto the ship while Lapis is fishing, and trying to force her way on, causing multiple loud bangs to be heard and making the ship's engine fail. Jasper finally climbs aboard via the anchor chain and expresses her joy to seeing Lapis again.

Steven manifests his shield to protect Lapis but Jasper laughs it off and says that it should be the other way around since Lapis is much more powerful, as Jasper describes her to be a "monster". Eventually, Jasper aggressively hits Steven which flings him across the ship's deck. Jasper gets down on her knees and holds Lapis' hand, begging her to fuse with her again since Malachite was so powerful. Jasper acts manipulative, claiming that she changed but Lapis rejects the offer. Steven sticks up for Lapis once more which causes Jasper to aggressively charge at Steven, but with quick reaction, Lapis shoots a water fist through the deck floor, hitting Jasper high into the air and far, far away into the ocean.

In "Gem Hunt", Jasper follows two Corrupted Gems in the Great North. She poofs one of them off screen, and later appears in front of Steven and Connie when they are in the middle of fighting a Corrupted Gem. Jasper brutally injures the monster, throwing punches to the face and slamming it to the ground by its tail. Jasper manages to poof the monster by forcefully pulling its gemstone from its body. Steven, Connie, and Pearl (who later shows up) are shocked to see Jasper. Jasper teases Steven, saying "Rose, look what I got", revealing both of the monsters' gemstones. Jasper then walks away until she cannot be seen in the snowstorm.

In "Crack the Whip", Jasper rises out of the ocean on the beach with her two monsters. Before Jasper rose to the surface, Amethyst defeats one of the monsters that appeared first, and Steven bubbles it. Once Jasper is on the surface, she is seen on top of the other monster with her Crash Helmet equipped. Jasper reveals to Steven, Connie, and Amethyst that her plan is to create her own army to rival Rose's (Steven's). Amethyst tells Steven and Connie to go after the monster and that she'll take Jasper herself. Jasper is amused, but is also disappointed because she wanted to fight Steven, and not a "runt". Jasper then brutally knocks Amethyst on the ground and rolls over her helpless body with a spin dash. Jasper becomes bored, and wonders why Amethyst isn't trying her hardest. She says Amethyst is a Quartz soldier like her, but she's defective, and Jasper says she lives to fight. Amethyst tells Jasper that Rose said she was perfect the way she is, and Jasper insults Rose by saying that statement is false, causing Amethyst to become furious. She spin dashes at Jasper, but Jasper easily stops it and manages to poof her by slamming Amethyst to the ground with her helmet. Jasper holds Amethyst's gemstone in her hand and was planning on shattering it. When Steven and Connie saw what Jasper was going to do, they charged after Jasper and fused into Stevonnie. Jasper is surprised by the fusion, and after Lion launches the monster toward her, the monster tries to flee, but Jasper tugs it by the tail and mounts it. Stevonnie mounts Lion and Jasper is excited to face each other head-on. The two charge at each other, on their respective mounts, and at the last second Stevonnie jumps into the air, throws a shield at Jasper, forcing her to catch it, and they poof the monster with Rose's Sword. Jasper takes the monster's gemstone and tells Stevonnie that she will be back and Jaspers always get they want. She then slowly sinks herself into the ocean.

In "Beta", it is revealed that Jasper was created in the Beta Kindergarten halfway during the war when Homeworld needed to quickly grow more Quartz soldiers. She came out as the perfect Quartz, as described by Peridot. Later, Jasper is shown to have caged up a lot of Corrupted Gems behind metal bars in the holes of the Beta Kindergarten.

In "Earthlings", Jasper talks to one of the Snow Monster (who is caged up) about how she is a disgrace and embarrassment to Homeworld along with being pathetic Quartz. Amethyst attempts to sneak up on Jasper by walking across the edge of a cliff above her, but Jasper notices and Amethyst falls to the ground. Jasper wonders if she wants a rematch, and tells Amethyst that she was destined to lose to her the moment she came out wrong. Steven runs to Amethyst’s aid and explains to Jasper how that isn’t true, but Jasper claims that all Gems must serve the order of the Diamonds, and those who stray away from that objective must be punished. Jasper says that to come out wrong and to not serve the Diamonds, as well as protect the Earth are disgraceful acts.

Amethyst swings her whip before Jasper can counterattack and ends up pushing her back twice, but does no damage. Jasper attacks Amethyst and she falls on the ground, but before another attack can be made, Steven launches his shield and causes an injector to fall, separating Jasper and Amethyst. Steven and Amethyst fuse into Smoky Quartz after Steven cheers her up, and Jasper angrily asks if fusion is the only trick the Crystal Gems can pull off. Jasper becomes enraged by Peridot’s laughter and attacks Smoky Quartz head on, but she easily counterattacks, even causing Jasper to slam into the cliff side and release some of the caged up monsters. Jasper notices that the Great North monster is still caged up, and fuses with it. Smoky Quartz is still able to stop this corrupted fusion, and the Great North monster flees following Jasper’s attempts to forcefully refuse with it.

Jasper lies on the ground with inflamed arms and laughs off the fact that nobody she fuses with wants to stay.

Green spots began to form on Jasper’s body, along with spikes, to Peridot’s disgust, causing Smoky Quartz to unfuse when realizing it’s corruption. Steven tries to calm Jasper down in order to heal her. Jasper still sees her as the enemy, and says “Rose” out of breath. Steven explains that he is not Rose and just wants to heal Jasper. Steven moves his hand, with healing spit on it, towards Jasper which causes her to lash out and knock Steven backwards. Jasper tells Steven that she understands Rose’s methods now, she waits until after Gems are weak and useless and then manipulates them to join her team. Jasper points out how Peridot was stripped of everything that made her great, and Peridot explains how the Earth is not a bad place and that she is always learning new things.

Jasper goes on to say, as her corruption worsens, “Earth… is a prison. And I got out because I’m better than this place. I only came back to finish you off. You can’t manipulate me Rose Quartz!... I’ve been fighting since I broke free from the Earth’s crust! Because of what YOU did to my colony, because of what YOU did to my planet, because of what YOU did to my Diamond!” Steven asks “Yellow Diamond?”, and to Jasper's dismay, she responds, “My Diamond... Your Diamond... PINK. DIAMOND!!” before becoming fully corrupted, revealing that Jasper and Rose both belonged to Pink Diamond at some point. Peridot launches a bar of metal through Jasper’s chest, poofing her, and Amethyst bubbles and sends her to the Temple.

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