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buttterknifeee · 3 years

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Sisters- Teen Titans x Aquagirl Reader

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Summary: You don't get along well with your own siblings, but maybe you'll get along well with Starfire's super-cool, definitely-not-evil sister!

Pairings: Platonic! Starfire x reader

Word Count: 3575

A/N: Hey guys!!! Sorry for posting this so late I just did this one a lot slower lol. Unfortunately, school's starting soon so I won't be able to write as often. I'm still working on 2 fics so keep that in mind if you want to request!

Carnivals were the best invention in the world, you decided. The rides, the food, the games, and you only get to enjoy it a few times a year. So when the carnival does come to visit, you always make sure to enjoy it as much as you can.

“Don’t you just lovvvveee carnivals?” You say, walking next to Raven.

“Well, Beast Boy and Cyborg have been trying to win an animal from a single game for the past hour and Robin and Starfire are probably making out on the ferris wheel, so not as much as you.” she says, staring straight ahead. The others had paired up and set off when you first entered the carnival, so that left you with Raven. And as much as you love Raven, you love her in a “meditating/book club” way, not a “fun adventure” way. You approached the two boys as they finally won their carnival game prize.

“Told you we’d win a prize” Beast Boy grinned at Raven, holding a toy chicken to her face.

“A giant chicken. I must be the luckiest girl in the world.” She said sarcastically.

Suddenly, Robin jumped in front of the four of you.

“Titans! Trouble!” He yelled, standing up from a crouching position.

“Where’s Starfire?” Cyborg asked.

“That's the trouble,” Robin said, then promptly took off. The four of you followed him close behind. He brings the four of you to a dock, where you finally see the “trouble” Robin was talking about. Starfire was being chased by a flying, squid-like space robot with tentacles and everything. She flies past the five of you, the flying machine doing the same.

“Who’s her new best friend?” Beast Boy asks, staring at the scene before you.

“Don’t know, but I can’t wait to meet him,” Robin said.

Starfire hid behind you as the flying machine continued to follow her. Beast Boy turned into an alligator and tried to attack the robotic squid, but missed. You tried to hit it with jets of water, but it bounced off of its exterior. Raven threw a hot dog cart at the machine with her telekinesis, but it simply tore straight through the cart. Cyborg grabbed onto the tentacles and strained as the machine tried to get away.

“Don't know what you did to make this thing mad, Star, but it couldn't hurt to apologize!” Cyborg yelled, trying to keep a grip on the tentacles.

“I am… sorry?” Starfire apologizes confusingly, taking shelter behind a grimacing Robin.

Cyborg loses grip on the mysterious space squid as Robin jumps forward. He hits the machine hard with his staff and it falls into the water. A moment of silence falls onto the six of you.

“So, did we just win?” Beast Boy asked.

His answer came in the form of the machine crashing through the floor and back into the sky. Robin jumps onto it.

“Don’t see an OFF switch,” He yells. “Guess I’ll have to make one!” He punches into the side of the machine. The machine goes haywire, and Robin jumps off of it before it flies crazily into the sky and blows up. Since there were already fireworks, any regular citizens could have easily mistaken it for one of the big finals. You turned your attention to Starfire.

“Starfire, are you alright?” you ask. She nodded with a small smile.

“Whatever that thing was, it can’t hurt you now.” Robin said, now next to her again.

Starfire frowned. “But… why did it wish to hurt me at all?”

You found yourself back in the tower after such an eventful night. Despite being attacked by some alien machine, Starfire seemed to be in a cheery mood.

“I shall thank you for my rescue by reciting the Poem of Gratitude, all six thousand verses.” She said, a giant smile on her face. You and the others stopped dead in your tracks, not excited for how the rest of the night will seem to go.

“I think ‘thank you’ cuts it,” You say.

Suddenly, you hear a voice. “I see you haven’t changed a bit.” The voice belonged to a girl who bore a striking resemblance to Starfire. She had long, black hair, and wore a black outfit similar to Starfire, except hers had more metal components. The mystery girl continued.

“When we were little, I was always rescuing Starfire.”

“Sister!” Starfire squealed, running to hug her. Starfire’s sister smiled, holding up a necklace with a large green gem as the pendant.

“A Centauri Moon Diamond?? Where did you get-”

“On the Centauri Moons of course.” the sister said, fastening the necklace around Starfire’s neck. “Oh look, it matches your eyes.” Starfire smiled brightly. You remember that you’ve been staring at the two of them interacting when she turns to the five of you.

“I wish to introduce my big sister,” Starfire said. Her sister stepped in front of her.

“Blackfire,” she said. “ And since Star told me all about the Titans in her transmissions, let me guess.” She walks over to Cyborg.

“Cyborg,” She guessed correctly.

“Pleased to meet you little lady,” Cyborg says, holding out his hand. She takes it and you hear the sound of metal bending. Cyborg holds up his hand, now bent out of shape.

“Little lady, big handshake. Well alright!” he says with a smile. Blackfire moves on.

“Raven. I like that gemstone on your Ajna chakra,” Blackfire says.

“You know about chakras?” Raven asked, mildly impressed.

“I got way into meditation on Altara Prime.” She says casually. She then turned to you.

“Aquagirl. Oh my god your outfit is soooo cute! And your hair, how do you get it so healthy?” She said, clasping your hands. Her voice was nothing like Starfire’s; it was much smoother, and more confident, not to mention she had the American accent down.

“Mix of coconut oil, avocado, and a cabinet full of hair ointments” you wink.

“You’ll have to give me tips.” she winked back.

She continued her introductions, finally getting to Robin. She was all over him, complimenting his outfit, calling his mask ‘mysterious’, etc. You saw Starfire steaming with anger, even if she didn’t show it. She intercepted them as Blackfire got close to his face.

“So beloved sister, what brings you to Earth?” Starfire asks, an annoyed grin spread across her face.

“I was in the quadrant. Thought I'd see if Earthlings like to party.” She said, hopping onto the couch. “Besides, I needed a rest. Nearly got sucked into a black hole on the way here.” Immediately, the three boys rushed over to her, the three of you girls still behind them. You rolled your eyes at the sight of the three teens crowding around Blackfire.

“Black hole?”

“No way!”

“Cool”

You could feel Blackfire’s smirk as she began her story.

“Okay. I’m cruising through Draconis Nebula and-”

Starfire interrupted. “Sister! That nebula is full of black holes! You know travel there is forbidden.” The four teens on the couch stared at her.

“Most fun things in life are. Now be a sweetie and bring me one of those sodas I've heard so much about.” Blackfire waved at her and turned back to the boys. You heard her continue the story, but all you could focus on was Starfire grumbling towards the fridge. You look at Raven; your way of saying Ill go after her.

You find Starfire taking a soda can out of the fridge, talking to herself.

“Starfire?” you ask. She flinches at your approach, almost dropping the soda in her hand.

“Oh! Aquagirl. You have caught me off guard, my apologies,” she rubs her neck, blushing.

“You alright? You seemed a little worked up back there,” you say as the teen straightened herself up.

“Oh it's nothing, it's just that…” she sighed, closing the refrigerator. “My sister has always acted in such a way that can cause me to feel… annoyed.”

“Oh well, if you ever want to talk about it, I’m always here.” She hugs you, still holding the can of soda.

“Thank you my friend”

The next day, You were sitting in your room. Starfire barged in while you were rubbing the water from your head with your towel.

“Oh hey Starfire! What's up?” you smile, putting the towel onto your bed.

“Aquagirl! Have you seen Blackfire?” she asked. You noticed that she seemed distressed, but decided to answer her question first.

“Oh! We just went surfing! She crushed those waves!” You say, reminiscing. She was surprisingly good at surfing, especially since she told you it was her first time. Starfire frowned.

“Oh. alright.” you frowned back at her answer.

“Well, I think she might be with Robin right now. Is everything alright?” you ask. Her face turns bright red at the mention of Robin’s name.

“N- I mean, yes! Everything is alright. I must go.” She slammed the door before you could say anything. You wanted to go after her, but you figured since she left so quickly, she's probably not in the mood to talk. You went about your day, still a little worried about her.

Nighttime fell, and you sat on the couch with the other Titans, relaxing after an uneventful day. Starfire skipped in holding popcorn, candy, and a bunch of CDs.

“Friends! I invite you to join me in the togetherness of a stay-home movie night. I bring you popcorn and non-cotton candies. Tell me, what sort of movie shall we view?”

“Action,” said Robin.

“Romance!” you cheered.

“Comedy.” spat Beast Boy.

“Sci-fi” Cyborg offered.

“Horror.” Raven said flatly. Starfire drops her goodies.

“Perhaps a double feature?” she asked.

“Forget the flicks, kids.” You looked up to see Blackfire, now dressed in Starfire’s clothes. “We’re going out!”

“We are? Where did you- How did you-” Starfire stuttered, obviously confused by her sister’s new look.

“Heard about a party downtown,” Blackfire continued, ignoring her sister. “Cool crowd, hot music”

“Sound’s nice!” you say.

“Yeah!” Beast Boy agrees.

“I’m in!” Cyborg says.

“Why not?” Robin smiles. Raven kept looking at her book.

“And it's in an abandoned warehouse,” Blackfire adds. Raven looked up from her book, her way of saying that she's in. You all began to leave. You noticed Starfire still standing where she was, looking a bit sadder.

“Starfire? you coming?” you asked, walking by her.

“Oh um, I guess I will go,” she said, hanging her head a bit. You looked at her but she didn’t meet your eyes. Maybe she’s tired, you thought, walking to catch up with the other titans.

You entered the party, taking in the colorful lights and dancing teens. You followed Blackfire onto the dance floor, who seemed to already be dancing.

“Step aside Earthlings, the queen of the galaxy has arrived!” she cheered, swaying her hips with the other teens. She looks at the rest of you, a smirk on her face.

“Now don't tell me you big tough superheroes are afraid of a little dancing.” she says, beckoning you to do so. The boys joined in, and you noticed that Raven left the dance floor with a boy. The only people who weren’t dancing were you and Starfire. Starfire looked scared, she was clutching her new necklace, and you swore that she said something about shovels. You came up to her and took her hand.

“Let’s go Starfire, I think you need some air.” you say, leading her to the stairwell.

You sat next to her on the roof, both awkwardly silent.

“So, what's wrong?” you finally say.

“It’s my sister again,” she sighs. “It feels as though she has stolen you all from me, and I don’t know how to keep that from happening.”

“Hey. we’ll always be your friends, just as you’ll be ours. And she didn’t steal us from you, we just thought she was cool and all-” you were cut off by a yell from the part below.

“YO A.G.!!! YOU GOTTA COME DOWN HERE!!!” Cyborg yelled. You looked at the direction of the sound and then back at Starfire, who was staring at the ground.

“Oh- uh they probably need me, I’ll be right back,” You say, rubbing her arm. “HANG ON I'LL BE THERE IN A SEC!”

You race down to the dance floor and see Cyborg dancing.

“YO THEY’RE TOTALLY PLAYING YOUR SONG!” he yelled. Ugh I should get back to Starfire but they are totally playing my song, you thought. You look at Cyborg again, who was waving at you to join him. You see Robin next to you and pull him aside.

“Hey Aquagirl! Where’s Starfire?” He asked. You cross your arms.

“She’s upstairs on the roof. Listen, she’s super down in the dumps right now, I think you should talk to her.” You say. He nods and leaves, heading towards the stairs. You sigh as you go back to join your other friends. You bump into Blackfire, who was now sporting a neon pink wig.

“Um, nice wig,” you say.

“Thanks hot stuff. Where’s Robin? I saw you with him earlier.” She asked, still dancing. You weren’t sure if it was the best idea to tell her.

“He’s uhhhhhhh….” you try to stall.

“... with Starfire.” she finishes. You turn to see her staring through the glass roof, where you could see Robin and Starfire sitting together. She turns to the rest of you.

“One sec guys!” She winks. Less than a minute goes by and she reappears with Robin. You make eye contact; he seemed annoyed by being back here.

“We HAVE to dance to this song!” she says, starting to dance again next to Robin. He steps away from her.

“Sorry, but I’m going to check on Starfire again.” Robin says, heading to the stairwell again. Blackfire follows him, trying to get him to return, leaving you with Cyborg and Beast Boy. They continue to dance and you roll your eyes.

Suddenly, you notice Starfire fighting something. You squint at her location, then realize that what she's attacking is one of the robots from yesterday. You look at the two boys who’ve quite literally been dancing the whole time.

“Cyborg! Beast Boy! Starfire’s in trouble!” You yell, already running towards the exit. Suddenly, another of those robots appears out of nowhere.

“What the- AHHHHH!!!!” you scream as the robot latches onto you and drags you away. The two boys try to follow you but a third robot attacks them, leaving you to still be stuck in the clutches of the space robot. You see Raven hanging out with the boy from earlier (they’d be a cute couple huh) and she spots you. She flies after you, flinging two robots towards the machine as you finally break free. Starfire crashes into the room through the ceiling and lands in the crates, Cyborg and Beast Boy still taking on the other robot.

All three of the robots start chasing Starfire, and she flies around the room trying to lose them. Cyborg knocks into them and lays some punches, you trying to short circuit them by spraying them with water. One of the robots hits Cyborg, sending him flying into a wall. Another one sends Starfire flying into a different wall, and she lands in a dumpster. You run to the hole in the wall to find the aliens trying to bring the whole dumpster into the air. You were about to try to strike them when you saw a flash- the flash of a birdarang. It cuts into the arms of the robot and drops the container. Robin joins the rest of you.

“Titans Go!” Robin yells, but Blackfire flies out in front of you. In a matter of seconds she demolished all three robots. You all surrounded her as she stood victoriously.

“Aw yeah! Good times!”

“Nice shot, Tex!”

“Very nice.”

“Couldn’t have said it better myself!”

“How did you know where to hit them?” Robin asked.

“Lucky guess,” Blackfire shrugged. Cyborg stepped forward.

“We could use luck like that,” he said. “Maybe you oughta join the team.”

“Me? A teen titan?” Blackfire asked, obviously flattered. You couldn’t help but notice Starfire looking away, a defeated look on her face. I should talk to her again, you decided.

You and Robin found Starfire standing on the roof of the Titans Tower. You found out that you both had the idea of finishing up your conversations, but it seemed that Starfire had different plans. You reach her as she floats into the air.

“Were you going to leave without saying goodbye?” Robin asked, causing her to whip around to face the two of you.

“A little rude if you ask me,” you tried to joke, but she didn’t laugh. Her head hanging, she slowly landed back on the roof, taking off the backpack she was wearing.

“Aquagirl, Robin, I- '' She began, but was cut off by the sound of a spaceship coming towards you. One of the aliens on board unleashes its arm, which is a tentacle much like one of the robot’s, and slashes you and Robin, sending you both to the ground. It then wraps around Starfire, pulling her into the ship.

Robin runs towards the screaming Starfire and jumps from the roof and towards the ship. You watch in horror as he misses, and begins the fall towards the ground. The ship continues its ascent into the air.

“ROBIN!” you scream, running towards the edge of the Tower’s roof. You can do this, you can do this, you can-

You focused hard, and raised your arms above you. A geyser of water shoots up from the shore and catches Robin. You raised the geyser up towards the hull of the spaceship, allowing the Boy Wonder to grab onto the bottom and make his way up. Seeing that he made it safely on board, you dropped the geyser of water.

You fell to your knees, breathing heavily. You haven’t made such a strong geyser in, well, never! Your vision was blurring as Beast Boy, Cyborg, and Raven all rushed onto the roof.

“Aquagirl! What happened?” Cyborg asked, helping you up.

“Starfire… Spaceship… Robin… I helped…” you huffed, pointing towards the spaceship, which was now far away from the tower.

“We gotta catch up to them. But how?” Beast Boy said, staring at the silhouette in the distance.

“Follow my lead.” Raven said, grabbing on to Beast Boy and Cyborg, who was holding into you. You watched as she made a dark portal in front of you. She pulled the three of you through it and you found yourself in the outskirts of the city, next to mountains and a river. You see Starfire and Robin up ahead, in front of a now toppled over spaceship.

“Starfire! Robin!” Beast Boy yelled as you caught up to them.

“Are you alright?” Cyborg asked. Suddenly, you see two aliens emerge from the shipwreck.

“Titans! Get ready!” he said, assuming a fighting stance, which you follow. You wait tensely as the aliens approach you.

“In the name of the Grand Centauri Empire, you are all under arrest.” one of the aliens says, showing off a professional looking police badge. You stare at it. If they're police, why are they arresting us? And why are we fighting them?

“Uh… you can’t be the good guys. We’re the good guys.” Beast Boy says, just as confused as you are.

“And we are the Centauri Police,” the second alien repeats.

“The Tamaranean girl is a liar and a thief.” the first police alien says, pointing at Starfire. “She's committed high crimes throughout the entire Centauri system.”

“I have never even been to the Centauri moons!” Starfire pleaded.

Suddenly everything clicked. The necklace, the events at the carnival, the events at the party. All evidence seemed to have pointed to Starfire, but they actually pointed at another person.

“But I know someone who has.” you and Robin say at the same time. You look at each other, obviously aware of who the other was thinking.

Blackfire.

Robin took off Starfire’s necklace for her and threw it aside. He faced the police aliens.

“You’ve been chasing the wrong girl. Where’s Blackfire?” Robin says. Before any of the other Titans could answer, you saw a figure flying through the sky.

“That Bitch!” you yelled, watching Blackfire make an escape.

“Don’t worry Star, she won't get away with this,” Robin says to Starfire, but her eyes are already glowing.

“No she will not!” she yells, and shoots off into the sky. You couldn’t see much, but there were flashes of bright green and purple in the sky. The Centauri police calmly rebalanced their ship and restarted it, its engine humming to life.

You then watched as they proceeded to fly up into the sky and capture Blackfire, similar to how they initially captured Starfire, and fly off into the night. You stared dumbfounded.

"What just happened?"

The next morning, you stood in front of the kitchen, making pancakes with Cyborg.

“Crazy what happened last night, huh?” you yawned, watching the pancakes sizzle on the stove.

“No kidding,” he said. “She would’ve made a great addition to the team, except for the intergalactic-criminal part.” You laughed, flipping the rest of the pancakes.

You climbed up to the roof, finding Robin and Starfire sitting together. God they’re probably being cheesy together you thought. You cleared your throat, the two of them jumping at your presence.

“Hey you two,” you winked. “Breakfast is ready!!!”

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