Spinel

"Hey, are you Steven Universe?... Perfect."

- Spinel finding Steven

"You know, I came here to take my anger out on a bunch of strangers, but now that I know you, I wanna kill you even more."

- Spinel telling and expressing her hatred for Steven

"Just can it, won't ya?! You can't just make everything better by singing SOME STUPID SONG!"

- Spinel fighting Steven

Spinel is the main antagonist of the 2019 Cartoon Network animated television film Steven Universe: The Movie. She is Pink Diamond/Rose Quartz's former best friend of the Homeworld Gems, who was abandoned by Pink in order to turn Earth into a colony for Homeworld. After realizing Pink wasn't going to come back to her and after hearing about Steven Universe, she decided a plan to destroy Earth, all organic life, and everything Steven loves.

She is voiced by Sarah Stiles.

Appearance
Spinel appearance is seemingly based off an old-fashioned cartoon. Spinel has a pink complexion, magenta eyes, a small pointy nose, and magenta hair that is styled into a pair of pigtails. Whe she became evil,  she has three black lines underneath both of her eyes, reminiscent of running mascara. Her clothing consists of a dark magenta top, puffy hot pink sleeves, puffy magenta shorts, hot pink wrist-length gloves, white stockings and a pair of magenta knee-high boots. Overall, her appearance is similar to that of an old-fashioned cartoon.

Her gemstone is located in the center of her chest, cut in the shape of an heart. When she became evil, her heart-shaped gemstone is upside down. Before she became evil, she has pigtails that are shaped like hearts.

Personality
Originally, Spinel had a goofy, fun-loving and a rather innocent personality, being Pink Diamond's best friend to the point of being clingy. She greatly enjoyed her time with Pink Diamond and viewed her as her best and only friend. This friendship turned into practically undying loyalty, as she did not hesitate to wait 6,000 years for Pink Diamond when she was told by her it was part of a game.

However, upon seeing Steven's message, she realized that Pink had completely forgotten about her and started a new life with family and friends and left Spinel alone, not even bothering to send her back to Homeworld or formally tell her that Pink didn't want to bring Spinel with her. Upon realizing this, Spinel was heartbroken and brought to tears, utterly devastated with this information.

It was because of this event that she became filled with unyielding rage and hatred. Out of spite and anger towards Steven and the other Crystal Gems for their close relationships with Pink Diamond, she decided to get a drill with poisonous bile that would destroy all organic life on Earth. While fueled by rage, she still retained her humor and jovial nature, even while fighting the Crystal Gems. She took sadistic joy in knowing that Earth would be destroyed and stated that after knowing Steven, she wanted to kill him even more.

Despite her more evil nature, she still longed for a friend, and upon seeing that Steven was willing to be there for her, she decided to stop her plan at destroying the Earth and became momentarily redeemed. Upon being reformed, she appeared rather nervous around the other gems and constantly hid behind Steven.

After having her innocence broken and her faith in Pink Diamond shattered, she became much more paranoid and on-guard, which was why upon hearing Steven saying that once Garnet's memories and his powers were restored, they could live "happily ever after", she viewed the remark as meaning she'd be excluded and left alone once again. Then, when she saw Steven had her scythe in his pocket, Spinel immediately viewed it as proof that once she did what Steven wanted of her, he would get rid of her when her back was turned. This caused her to once again return to her former evil self and resume her destruction of all organic life on Earth.

As she continued fighting with Steven, she became overwhelmingly enraged by Steven attempting to reason with her and convincing her she could change, believing that he didn't understand how she felt and that he couldn't change how she felt. She began acting purely on rage, pummeling Steven with endless punches and attacks; while doing this, she openly admitted that she had changed for the worse, going so far as to say before, she wasn't good enough for Pink Diamond, but now, she wasn't good enough at all.

After seeing how far she'd fallen, how violent she'd become, how much she wanted to hurt Steven, and how Steven had actually liked her, Spinel began to crumble under her pain and sadness, realizing how far she had fallen and how monstrous she had become, remembering that all she wanted was to be a friend. Once she came to accept her sins and Steven's friendship, Spinel became fully redeemed, now dedicated to making new friends and starting from scratch.

History
Previously belonging to Pink Diamond, Spinel was abandoned by her for thousands of years, left waiting alone in the garden. After 6,000 years of waiting, Spinel finally had gotten news on what has become of her Diamond. She learns that Pink Diamond no longer exists and had given up her physical form to give birth to her son, Steven. After learning this and also realizing the fact that her Diamond abandoned her, she changed her appearance and swore vengeance on Steven and Pink's "new friends".

Later on that same day, Spinel arrived on Earth on a massive injector, that she then injected into the ground. As the injector began filling the ground with poison, Spinel began to fight against the Crystal Gems and poofed Garnet, Amethyst, and Pearl in the process with her Gem Rejuvenator. Furious, Steven manages to grab hold of her weapon and poofs Spinel with it as well.

After the battle, Steven brings the poofed gems (including Spinel) to the temple where he learns, after the Crystal Gems had reformed, that they have lost their memory. Not too long after this revelation, Spinel reforms too and acts oddly friendly and playful towards Steven, calling him her new best friend.

Throughout the movie, Spinel would follow Steven everywhere he went and would "help" him get his friends' memories back. While doing so, she would also try to play with him, but never got to chance to, due to him being too focused on helping his friends. After helping Amethyst, Steven and the other remaining Crystal Gems learned that the only one who can stop Spinel's injector is Spinel herself, but in order to do that they need her to remember who she is and since Pearl is the only one who seems to know her, the group decides to help her next. That evening, Spinel would join Steven and the other Crystal Gems at the Abandoned Warehouse, where they would try to get Pearl to regain her memories by listening to a song written by Sadie Killer and the Suspects ("Disobedient"). When that didn't work, Steven figured out that the only way Pearl would be able to think for herself, as well as regain her memories, is if her owner "disappeared", just like Rose did. In order to do just that, Steven fuses with Greg (who Pearl thought was her owner) and forms a new fusion named, Steg. Steg then sings a song ("Independent Together") that helps Pearl remember who she is and later duets with him (as Opal).

Although the song had succeeded in helping Pearl, it caused Spinel to see that Steven cares more for his friends than her. Upset, she flees to Pink Diamond's Garden, where she tells Steven the story of her past as well as her abandonment, causing her to return to her former self. Steven, feeling bad for Spinel, befriends her and brings her back to the Gems and Connie, who, after initially being wary, agree to let Spinel help Steven in deactivating the Injector.

Upon deactivating it, Spinel is once again hurt by Steven's reaction. She then claims that he only needed her for the Injector, and did not want to be her friend. Thinking he will betray her as his mother did, she resorts back to her old behavior and attacks Steven, this, however, causes Garnet to regain her memories as well. Spinel then retreats to the top of the Injector and is soon followed by Steven, who then tries to talk to her. This further infuriates her, causing them to fight, until it becomes apparent she has lost her motivation to destroy him and regrets her actions up until that point. Steven, now fully reunited with his powers, comforts her and claims she can start fresh with new people to be her friends. The Injector then explodes due to the battle, and Steven saves Spinel by entrapping her in his bubble alongside him. Steven then attempts to comfort her again, as Spinel decides she has created too much damage and must leave.

The Diamonds then arrive, ready to confront Steven about where they will live and Steven introduces Spinel to them, thus giving her the new friends he promised. Spinel then says goodbye to Steven and leaves Earth with alongside the Diamonds.

Pink Diamond
Spinel was Pink Diamond's playmate and "best friend". Created solely to entertain Pink, Spinel considered herself to be Pink's best friend, and for a time, the two were inseparable. However, they gradually grew apart as Pink yearned for more responsibilities and more maturity. Oblivious to this, Spinel continued to attempt to entertain Pink, her attitude now seeming more immature in comparison. She also became clingy; upon Pink's allocation of Earth as her colony by the Diamonds, Spinel was intent on joining Pink on this new endeavor.

Very reluctant to allow Spinel to join her, Pink created a "new game" in order to get rid of her from her side, in which Spinel should wait for her return in the same spot, and never move. Spinel obliged and waited over 6,000 years for Pink's return. When Spinel finally realized that Pink had abandoned her after watching Steven's announcement on the Diamond Communicator, hurt and sorrow consumed Spinel, resulting in her taking on her current form and hunting down Steven to take revenge on Pink.

Pearl
The two were acquainted with one another as members of Pink Diamond's court, but presumably never interacted much. When Spinel and Pearl encountered each other for the first time in thousands of years, Pearl experienced shock over Spinel's return.

While the two never interact properly, it seems that Spinel holds a fair amount of resentment towards Pearl since Pink Diamond took Pearl with her to earth but left Spinel behind. This is evident when Spinel mentions it and is barely able to keep herself from screaming in anger.

Steven Universe
Spinel sought out revenge on Steven due to him being the descendant of Pink Diamond, as stated by his broadcast, and she was jealous of the fact that he, or "Pink", now had new friends that were not herself. Hurt by Pink's abandonment, she vowed to destroy Steven's new friends and the planet that Pink had loved so much. Steven accidentally poofs her, perceiving her as a threat once she has poofed Garnet, Amethyst, and Pearl.

However, upon her regeneration, the two become mutual acquaintances, with Spinel resuming her 'Best Friend' status with Steven, as she did with Pink. The two are inseparable, with the relationship heavily skewed; coming mostly from Spinel. Upon a small disagreement where Spinel sees Steven caring more for his friends than her, she flees to Pink Diamond's Garden, where she tells Steven the story of her past. Moved, and desperate to redeem the Gem, Steven brings Spinel back to the Gems and Connie, who, after initially being wary, agree to let Steven help Spinel to deactivate the Injector.

Upon deactivating it, Spinel is once again hurt by Steven's reaction; she claims he only needed her for the Injector, and did not want to be her friend. Reverting back to her old behavior, Spinel attacks Steven and briefly holds Garnet hostage, before retreating to the top of the Injector.

Steven ascends the injector to talk to Spinel, and they fight until it becomes apparent she has lost her motivation to destroy him and regrets her actions up until that point. Steven, now fully reunited with his powers, comforts her and claims she can start fresh with new people to be her friends. The Injector promptly explodes due to the battle, and Steven saves Spinel by entrapping her in his bubble alongside him. Steven then attempts to comfort her again, as Spinel decides she has created too much damage and must leave. The Diamonds then arrive, ready to confront Steven about where they will live, and Steven introduces Spinel to them, thus giving her the new friends he promised.

Garnet
To Be Added...

Amethyst
To Be Added...

White Diamond
Spinel remarked that the Diamonds saw her before, though it is unknown if this also includes White. The only known past instance of Spinel encountering the other Diamonds is when Pink was being told about her receiving her own colony by Blue and Yellow with White shown to be absent. It is possible that White was unaware of Spinel's abandonment in Pink's garden.

Upon encountering Spinel both of them began to take a liking to each other with White even proposing the idea of taking Spinel to Homeworld with them and letting her stay in the Diamond Palace. Spinel agreeing seems to indicate that she is on friendly terms with the Diamonds or at the very least is willing to become friends with them.

Blue Diamond
Along with Yellow Diamond, she was acquainted with Spinel thousands of years ago, though the degree to which they interacted is unknown. Over the course of several millennia, Blue seems to have forgotten of Spinel's existence, with her possibly being unaware of the fact that Pink left Spinel abandoned in her garden.

In present-day upon encountering Spinel she shows remorse after learning of her abandonment by Pink. Blue takes a liking to Spinel and her resemblance to Pink, along with her fellow Diamonds she was willing to offer Spinel to stay with them in the Diamond Palace. Spinel agreeing seems to indicate that she is on friendly terms with the Diamonds or at the very least is willing to become friends with them.

Yellow Diamond
Yellow and Blue Diamond were both acquainted with her thousands of years ago, though it isn't known how much or in which way they previously interacted. In present-day Yellow seemed surprised about "Pink's little playmate" still being around, and was possibly unaware that Pink left Spinel abandoned within her garden.

Upon her first encounter with Spinel in millennia Yellow is shown to be amused by her jokes and antics. She along with her fellow Diamonds took such a liking to her that they were willing to let her stay in the Diamond Palace. Spinel agreeing seems to indicate that she is on friendly terms with the Diamonds or at the very least is willing to become friends with them.

Quotes
"I'm the loser of the game you didn't know you were playing!"

- Spinel

"Oh, but it can be and it is. I got a new style and a few new toys that are gonna put an end to your happily ever after ONCE AND FOR ALL!"

- Spinel returning to end the Crystal Gems

"I just love that part where Pink Diamond spends the rest of her days on this nowhere planet with a bunch of nobodies."

- Spinel summarizing Pink's time on Earth

"Who am I? WHO AM I?! What are you even saying? I'm the loser of the game you didn't know you were playing!"

- Spinel after Steven ask who she is.

"NO!"

- Spinel refusing to let Steven leave without her

"Yeah, you must know all about her life without me! Rub it in, why don't ya?!"

- Spinel angry at Steven and Pink Diamond

"What about me? (Steven: Huh?) Is that all you needed me for? To turn off my injector. (Steven: No. Well... Sort of, but...) Well, what now? I-I did what you wanted. That's it? (Steven: Well yeah. We can just forget this whole thing ever happened.) How are you going to forget with me around? I'm the source of all your problems. Don't pretend you want me here. What's your plan for me, huh? You gonna put me somewhere? You gonna leave me somewhere? You gonna leave me alone?!"

- Spinel's mental breakdown

"Why do you have that?... We can just forget this ever happened. You mean, 'I' can just forget this ever happened!... Wow! What a plan! I turn off the injector, and then the moment my back is turned, BAM! PRESTO! CHANGE-O! PROBLEM SOLVED! Well, think again. You're not getting rid of me that easy... I'm not letting you get one over on me, Steven Universe."

- Spinel feeling betrayed and wrathful

"You know, this is pretty twisted, but I'm a little flattered you liked the old me, innocent, loving, stupid. If that's your thing why don't you leave her like this? (Steven: Get away from her.) Oh, you're so protective of your real friends, and you're so careless with your fake ones! (Steven: Stop it.) Then stop me! You wanna attack me, just admit it. Or better yet, just try it! (Steven: No.) WHY NOT?! (Steven: Because it's not the truth.)"

- Spinel provoking Steven

"I don't wanna play anymore."

- Spinel losing all sense of fun

"Ha. Wow! I knew I was going to set you back, but this is how you started? The legend, Steven Universe? You gotta be kidding me. How did a powerless loser like you, become savior of the galaxy?!"

- Spinel mocking and questioning Steven

"All that stuff's easy for you to say! When you change, you change for the better! When I CHANGE, I CHANGE FOR THE WORSE! I used to be Just! Not! Good enough! JUST! NOT! GOOD ENOUGH FOR PINK, But now... Now... I'm not good at all! That's funny, right? At least you found me entertaining. You actually... liked me... didn't you? What am I doing? Why do I wanna hurt you so bad? I'm supposed to be a friend! ...I just wanna be a friend..."

- Spinel's villainous breakdown.

Trivia

 * In gemology, spinels represent positivity, wealth and happiness.SpinelGem.png
 * For this, her gem is in a shape of a heart. The most common spinels are shaped as a water droplet. In order to be heart shaped, both spinels are together side by side.
 * Her appearance is based from Jenny Wakeman (or XJ9), the main heroine from My Life as a Teenage Robot.
 * It is unknown why Pink abandoned Spinel after instigating the rebellion. There are two possible reasons for that: Pink completely forgot about Spinel as she focused on the rebellion or she left Spinel behind as an act of mercy from the horror of the Gem War, although if that were the case, she would've retrieved her once the war was over.
 * She represents Pink's worst action so far in the series.
 * Blue Diamond stated that Spinel is one of Pink Diamond's lost treasure, which means that there might be Gems out there like her.