Part of your World
Pairing: Eric x mermaid!evil!reader
Summary: Y/n will not allow her sister, her father's favourite, to be happy; she will do everything to regain her happiness. Even if it means resorting to evil.
Warnings: Exaggeration of the characters' behaviour, a malicious and envious reader, references to shipwrecks and battles, the author does not know English.
From nymph: I finally finished writing the fanfic that had been gathering dust in my notes for so long, all because I couldn't write the middle part... divider: @saradika
But there was one joy in her life — a handsome young boy from the surface named Eric. He was a kind and charming boy who treated the young mermaid with such tenderness. They always had something to talk about.
"I will definitely marry you, Y/n!" the boy laughed loudly, and Y/n smiled trustingly in response.
However, soon Ariel herself began to dream of the world above the water, because she had long been curious about where her older sister so often swam off to. The little girl didn't really understand anything yet, but Y/n was like that too, so Ariel revealed her sister's secret to her father.
Then the waters of the ocean boiled with alarm, for Triton did not limit himself to the usual reprimand to his daughter, but shouted, overcome with righteous indignation. Frightened and trembling, Y/n stared at her father's angry face, feeling both horror and deep resentment.
"You will go to the deepest sea bottom until you learn your lesson!" the sea lord shouted indignantly.
"Father..." the unfortunate girl whispered timidly, but the king's loud voice stopped her, and two huge octopuses immediately grabbed her delicate hands with their tentacles, carrying her away from the palace.
Before leaving, Y/n managed to cast a hateful glance at her sister Ariel, who was hiding behind their angry father's back. The girl pressed her fist to her lips, her large blue eyes wide with fear, looking confused and bewildered.
"If you try to repeat your sister's actions and run away to the surface, I will be forced to do the same to you," the wise ruler warned his little daughter menacingly, softening a little and adopting a fatherly tone of voice.
And Y/n's heart was filled with black hatred for her father and younger sister. Was everything that was happening fair? After all, she was exactly two years older than the capricious Ariel! Why was there such a huge difference in the manifestation of her father's love? What had she done to deserve such cruelty, why had she been banished to a gloomy underwater prison?
The days dragged on slowly, even though the sentence was relatively short — only one month. What saved the girl's mind from complete madness was a wonderful shell found by chance in the sand at the bottom of the sea. This trinket had magical properties: thousands of ancient spells were hidden inside it. The shell whispered, imparting knowledge and guidance to the young princess, choosing her as its new successor.
The spells were varied: some were kind and bright, others were cunning and dangerous. Some allowed the girl to freely leave the dark cell hidden deep beneath the sea, remaining invisible to the guards patrolling the area. So Y/n gradually learned to leave and return unnoticed.
She no longer saw Eric in their secret place. Perhaps the boy waited patiently for his friend to return for some time, but in the end he lost hope and left the shore forever.
When the punishment was over, Y/n decided to remain alone, far from the hated castle and her relatives. Triton took her behaviour as childish sulking and stopped trying to bring his daughter home until she reached maturity.
"Yes/no..." exclaimed Ariel, suddenly waking up and noticing her sister's movement.
"What's wrong?" the girl replied sharply in an even, firm voice.
"Why are you leaving right now? We tried to arrange a pleasant evening for you..." Ariel muttered, looking with her large, round, sky-blue eyes, as if deliberately feigning touching pity.
"Thank you very much, I am really full, now I want to leave," Y/n said dryly, trying to avoid further questions.
"...Maybe you are ready to return to the royal chambers?" her father asked cautiously, watching his daughter's cold detachment intently.
"I have no desire to," Y/n snapped and instantly dissolved into the depths of the water, leaving her family in silence and disappointment. Triton sighed heavily.
But Y/n's big secret was that she had been watching her family for a long time. Thanks to a magical glass ball she had conjured up. She watched Ariel, saw how the girl was becoming more and more attracted to the surface. The young mermaid collected things that fell from above and settled on the seabed, or searched for human belongings in sunken ships. Y/N sighed heavily. If she showed Ariel's father how she was swimming to the surface, what would he do? She wanted him to get angry and lock his favourite daughter in the cave.
And finally, one day, Ariel surfaced because of the noise of a human ship. Y/n watched closely as her sister climbed onto the ship and watched the people. The people were having fun and dancing, drinking some kind of liquid from wooden mugs. Laughter and loud chatter pierced the silence of the night. Ariel watched everything spellbound when a dog ran up to her and began licking her face. The young mermaid laughed quietly. Then a youthful voice called the dog to him. Y/n froze. She couldn't be mistaken! It was Eric, but now an adult. He had turned from a funny boy into a handsome young man. He smiled and petted the dog, while Ariel stared at the young man in fascination. The woman shifted her attention to Eric, who looked awkwardly at his monument and scratched the back of his head. He was still the same shy young man who did not expect honours and glory. The man walked away from the monument, talking to a grey-haired man.
"The whole kingdom is waiting for you to choose a worthy girl!" said the old man.
"The girl is out there somewhere. I haven't found her yet," Eric replied, slightly sadly.
"Perhaps you haven't looked hard enough," remarked the old man.
"I'm trying to find her, but it seems she's hiding from me. But when I find her, I'll recognise her immediately," said the dark-haired man confidently.
Y/n's heart sank. She hoped that he was looking for her and that he remembered her. The woman quietly shed a tear, which mixed with the sea water.
Y/n clenched her fists, her nails digging into her palms, as she watched her sister sing about her love, about how she wanted to be with Eric. Y/n couldn't stand it; her sister wanted to take something that had never belonged to her. Then her sister was scared off by the old man, while Eric was already coming to his senses and looking for the person who had been singing to him.
Ariel swam away, hiding behind another rock, watching as the old man led the prince away, lecturing him. She smiled happily and continued her song. Y/N knew what she had to do; she had to tell her father that the time had come.
Triton sat on his throne, busy with royal affairs, and was surprised to see his daughter, who had disappeared from the castle, seemingly forever.
"Have you decided to return?" the king asked with a glimmer of hope. Y/n frowned, but then looked excited.
"No... but... I saw something you need to know about. It's about Ariel." The girl swam closer, and Triton put down his papers.
"What is it?" the man frowned.
"I accidentally saw my sister swimming to the surface."
"What?!" Triton shouted.
"It turns out she collects human things... she has a cave closer to the south," Y/N tried to hold back a smile.
"Are you sure?" Triton took his trident and stepped down from his throne.
"Yes, Father, I'm worried about her. It's not normal, is it?"
"That's right, I'm glad you understand that too... we'll have to explain it to your sister," the man swam to the exit, and Y/n hurried to her cave.
She activated the crystal ball again and watched as her father found the cave and yelled at Ariel, who tried to justify herself and defend herself. But Triton was unrelenting, he began to destroy everything he saw, the last point being Eric's sculpture, the king aimed his trident at him and shot a red lightning bolt. And then he swam away, to Ariel's cries. Y/N watched this and couldn't believe it. Her face reflected several emotions, and she finally felt pleasure. But that wasn't enough. The young princess's dark heart was poisoned with hatred, and she wanted to hurt her even more.
The next day, she sailed to Ariel, who was still sitting on the ruins of her cave.
"What happened here?" Y/n asked, feigning confusion. Her sister abruptly turned her gaze to the girl.
"It's our father... he found out that I collect things from the human world... and that I fell in love with a human..." She cried bitterly, and Y/N clenched her jaw.
"Didn't my bitter experience teach you anything?"
"I'm sorry... it must have been just as painful for you," said Ariel.
"You have no idea... Do you really love this man?"
"Yes... very much... but we can't be together," Ariel took Eric's stone face.
"What if I told you I could help you? I'll give you legs," Y/N added quietly and saw Ariel look at her.
"Really!? You can help me?" Ariel swam up to her sister.
"Yes, but the price will be high, because it's a powerful spell,"
"I agree!" Ariel said confidently, hugging her sister.
Y/n took her sister and they swam to the girl in the cave. There was a peculiar cauldron and many flasks. Ariel looked around, wanting to touch everything, but when she tried to pick something up, her sister slapped her hands away.
Y/n threw various ingredients into the cauldron, which bubbled and shimmered with different colours.
"You must give up your voice, it is the price for the spell," Y/n stood next to the cauldron and took the shell pendant from around her neck. "The spell will last for three days. To keep it from fading, you must make Er... the man fall in love with you, then the spell will not fade, but will grow stronger, and you will remain on land forever. If he does not fall in love, your legs will turn into a tail, and you will have to return to the water, but I will return your voice as well."
"But how can I talk to Eric? How can I make him fall in love with me?" Ariel asked fearfully.
"Why are you asking me? I told you about the price. If you're not ready, then stay at the bottom of the sea and don't stick your neck out," Y/n said irritably.
Ariel hesitated. She had the opportunity to meet the man she loved, but she couldn't say anything to him.
"You have to pay for everything," added Y/n, looking somewhere off to the side, noticing Flounder and Sebastian behind one of the rocks, she sighed irritably.
"I... am ready..." said the younger sister.
"...Then sing," Y/n held up the shell, which began to glow due to the magic, and when Ariel began to sing, it began to absorb her voice.
A clinging green smoke crept into Ariel's throat, sucking out her magical voice. The frightened mermaid grabbed her throat. Y/n took the shell and then cast a spell. The smoke from the shell and the cauldron mixed together, heading towards Ariel, enveloping her and turning her fish tail into human legs. The girl began to flounder, unable to swim with her legs, then Flounder and Sebastian appeared, pulling her out of the cave and directing her to the surface. Y/N laughed with satisfaction. All that remained was to wait. Without her voice, Ariel would be of no use to Eric, and she would return to the sea with a broken heart.
Y/N waited, and on the second day she decided to look into the ball to see her sister's downfall. But she was terribly disappointed when she saw Eric having fun with the girl, teaching her everything and trying to talk to her. The last straw was their walk on the lake. Sebastian tried to push Eric to kiss Ariel, but the man kept dodging and feeling embarrassed. Y/N couldn't take it anymore and cast a spell that flew through the ball and hit the boat, which capsized. They carefully climbed out of the water, Eric laughing loudly while Ariel tried to imitate laughter.
"What a cheeky girl! Oh no, Ariel, I won't let you stay on the surface, you must swim out to sea!" Y/n banged on the stone slab again. She rubbed the shell from which her sister's magical voice came, and Y/n came up with a plan, "Since you're so persistent, what will you do when a rival appears before you..."
Y/n smiled slyly, looking at the couple through the ball.
Under the cover of late evening, when the sky was tinged with purple and blue, Y/n appeared on the deserted seashore. Bright stars twinkled overhead, and moonlight gently reflected off the smooth surface of the waves. The girl wore an exquisite dress adorned with sparkling precious stones, emphasising her beauty. Her hair fluttered in the wind, adding mystery and charm to her appearance.
Now fate had to take a different turn; she knew she would not allow Ariel to find happiness. Gently touching her throat with her fingers, she took Ariel's voice away forever, replacing it with her own.
Y/N knew about Eric's habit of taking late-night walks along the shore, and she waited for him to appear. Soon, the silhouette of a man appeared on the horizon, slowly approaching the edge of the beach. His steps slowed as soon as he heard the first notes of a song coming from someone's lips.
Her song spread around, echoing in his heart. The sad, mournful notes penetrated deep into the young prince's soul, making him forget about the rest of the world. His head ached, but then it became easier. Seduced by the sweet sound, he walked towards the source of the sound, guided by an unknown force.
Halfway there, Y/n and Eric met. The man gazed enchantedly at the beautiful woman, watching in amazement as each tear rolled down her face. Feelings overwhelmed his soul, which had become easy prey to the magic of love.
Finally, her beloved had returned to her embrace, and for the first time, the girl could feel the warmth of his body. Pressing her forehead firmly against his chest, she allowed herself to enjoy the moment of closeness, assuring herself that this was true love, even if it was caused by magic.
"You probably won't remember anything..." Y/n whispered sadly, intertwining her fingers behind the man's belt.
Eric responded with silence, gently stroking her hair and pulling her closer to him. It seemed as if he was ready to absorb every part of her being, to unite with her forever, obeying the influence of a powerful love spell.
The morning of the next day marked the beginning of a new stage in their lives. Earl Grimsby, the prince's elderly advisor, greeted the newlyweds, enthusiastically expressing his admiration for them both. Eric looked at his bride with trepidation and love.
"I am very pleased to hear such compliments from you," said Y/n with an embarrassed smile, enjoying the warmth and confidence.
"Don't be silly! I was just happy to hear that Eric finally found you. Especially since you have such good manners, you're clearly from a noble family. I'm so glad he chose you and not..." The old man paused when he looked up at the stairs.
Y/n also noticed her younger sister behind the column. She was hiding from prying eyes. Y/n could clearly hear the hollow beating of a broken heart, and a triumphant laugh of malice arose within her.
Preparations for the wedding were proceeding at a rapid pace, and the wedding ship set sail that very day. Y/n's heart ached with anxiety; events were unfolding too quickly and flawlessly, causing her unease. To the girl's surprise, the dress turned out to be exactly as she had described it to little Eric, immersed in dreams of her long-awaited wedding.
Ariel no longer appeared in public, and Y/n did not try to seek her out. It seemed that her sister was not even on board the ship, which amused Y/n, as she found pleasure in thinking about her suffering. Sometimes the girl laughed quietly, admiring herself in the mirror. It was a hollow laugh that made insides grow cold.
"Until sunset..." Y/n repeated thoughtfully, touching the golden seashell-shaped pendant that adorned her neck.
A bright light flashed inside her, filled with the sound of Ariel's beautiful voice. Y/n pulled her hand away when her sister's voice broke through the protective barrier of the pendant.
After a while, the maids came to the woman, dressed her in a wedding gown, and carefully praised the bride's appearance. Encouraged by the attention, Y/n broke into a radiant smile.
Amidst the majestic ringing of bells on the ship, the ceremony began. Count Grimsby held her hand confidently, leading her to the altar. Before them stood the slender, handsome Eric, awaiting the upcoming wedding with impatience and joy. The girl caught Eric's fleeting glance and noticed two small tears rolling down his cheek. Y/n held her breath, wondering if Eric was fighting against the spell inside and wanted to break free, or if he was crying because of pain and resentment, because he did not want to see Y/n as his bride and wanted to run away to Ariel. But the girl shook her head and raised it proudly, gathering the admiring glances of the guests.
When there were only a few steps left to take, an attack suddenly occurred. A huge seagull flew at the girl, tearing at her curls with its beak, leaving traces of pain. Almost immediately after the first bird, the rest of the sea creatures appeared on the deck, causing chaos among the invited guests. Every living creature on board felt an inexplicable impulse of aggression towards Y/n herself.
In the heat of battle, the wounded seagull snatched the chain with the shell from Y/n's clenched fingers, throwing it high into the air. The octopus, moving nimbly among the people, pushed the woman straight into the birthday cake, breaking the layers and turning the celebration into ruins. The amulet itself fell right at Ariel's feet, making a final loud crack and scattering into pieces. Following it, the girl's soft, melodious voice finally turned joyfully to the man:
"Eric!"
The young man froze, shocked by the sight of the ruined wedding, the devastated food, and the humiliation of his beloved. His face contorted with pain and discontent when he noticed the crying and dirty Y/n, covered in the remains of the festive feast.
"Calm down, my dear," Eric said anxiously, lifting her off the floor and gently cleaning the remains of dessert from her soiled body.
Y/n listened to his words, trying to suppress her panic and sobs. The guests froze, the sea creatures stopped their attack, tired and motionless, scattering around the edge of the deck.
"How dare you ruin our wedding?!" Eric growled, looking closely at the assembled guests and sea creatures.
"But Eric, she..." Ariel objected uncertainly, looking desperately at the man.
"Was it you? Was this your doing? Envy overwhelmed your heart, could you really be capable of such betrayal? Look at my beloved, she dreamed of choosing the best cake, wearing the perfect dress, and now everything is lost forever!" the prince shouted passionately, feeling irritation and pain from what had happened.
Ariel's blue eyes widened in incomprehension.
"She cast a spell on me, took away my voice, and lured you in with deception! ...But... Why... Why didn't your feelings fade when the amulet was destroyed?" the girl wondered, trying in vain to explain the situation to her brother.
"Spell? What spell?" Eric asked incredulously, casting a wary glance at the redhead.
Y/N looked at the prince with undisguised amazement. Indeed, why hadn't the love spell lost its power, since its source — the magical shell — had been destroyed?
"Love spell! She used my voice to bewitch you! I was the one who sang for you that day! But now you don't recognise me!" Ariel cried hysterically, looking at Eric imploringly.
"I remember every moment of our meeting perfectly," the man replied calmly, continuing to hold Y/N in a tight embrace, gently stroking her wet shoulders, covered with cream stains from the cake.
"What do you mean? I don't understand..."
"Y/N charmed me many years ago, when she was still a child. Then she disappeared for a long time, but one evening I heard a familiar voice that belonged to you, Ariel, and I realised that this sound would lead me to the love of my life!" Eric explained, pulling away slightly from his bride to look into her eyes.
"Love spells lose their power if the object of affection already feels sincere love for the caster," added Y/n, nervously freeing herself from the prince's grip, but he managed to hold her by the hand.
Turning away from the setting sun, she focused her gaze on her sister, who had also noticed the change in light. Their eyes met, and each understood what would happen next.
"Eric, didn't you have real feelings for me?" Tears welled up in Ariel's eyes, rolling down her cheeks like pearls.
"No," the man said firmly, looking away from his future wife and at Ariel.
"But our moments together..."
"To me, you were a pleasant friend. My soul longed to meet the only companion I had chosen long ago," Eric finished firmly, clearly articulating his thoughts.
Blushing with grief, Ariel buried her face in her hands and sank into a heavy stream of salty tears. The sun had finally disappeared below the horizon, its rays that had previously illuminated the world vanishing into the darkness of the night. Green scales once again covered Ariel's skin, returning her to her former mermaid form. The stunned guests gasped, whispering to each other.
Y/n instinctively became frightened, suddenly her own legs would begin to change shape, turning into a mermaid's tail, but nothing happened, she continued to stand firmly on the ground in her torn dress.
The sea creatures began to gently descend into the depths of the ocean, trying to hide from human attention.
"So what does that mean?" asked Scuttle irritably, his bird call turning into a resonating noise that only sea creatures could understand.
"Only that the prince has been infatuated with Y/n all these years," Sebastian stated grimly, hiding in the shadows of the railings.
"But what will happen to poor Ariel now?" Flounder muttered anxiously, deeply concerned for his friend's fate, yet powerless, trapped in a bucket of water.
The prince tried to hold Y/n back when she took a step towards her sister, fearing that the young woman would decide to leave the ship and disappear into the depths of the sea. But Y/n, maintaining her dignity, approached Ariel, whose lost gaze clearly demonstrated her emotional emptiness.
"I never imagined the ending would turn out like this. I thought I would be the one left behind... But I'm so happy..." A single tear rolled down the woman's cheek.
"You..." Ariel moaned, unable to put her emotions into words.
"But he chose me... And I will finally understand what it means to be special and happy. I hope the pain in your heart will go away, but not quickly. Savour this terrible feeling, feel what it's like when you're not chosen and not loved," Y/n added quietly, turning away from her sister.
"Y/n?" Sebastian addressed her cautiously, deciding to intervene in the conversation.
"Sebastian, help her go back to the ocean. Tell Father that he will never see me again, I will stay here, next to my beloved," Y/n said confidently, turning to Eric, who visibly relaxed and breathed a sigh of relief.
Y/N threw Flounder overboard, and Ariel sat on the railing, took one last look at her sister and Eric, jumped overboard, and disappeared into the blue sea. Soon after, Sebastian jumped overboard, bowing his head in farewell, and Scuttle rose high into the sky and flew over the horizon.
Y/N looked at the sea; it was calm, but at some point, small waves began to rise. She didn't know if it was her father saying goodbye to her or just the whim of the sea. But she was sure of one thing: she would stay on land with the man she had chosen and who had chosen her.
