A/N: A while ago, I started thinking about MLP and Frozen, and at one point, I compared Elsa and Anna to Celestia and Luna. That brought up an interesting question: Why wasn't Anna the one who went crazy? And thus, this role-reversal fanfic was born.
Although I must warn you. There are a ton of Celestia and Luna parallels and some of the characters might appear OOC. This is all something I wrote if things went differently in the movie. If Anna was the one with the unstable powers instead of Elsa.
Also, I'm using the official movie script for a reference with the original dialogue, just to make sure certain scenes match up.
"Elsa. Psst. Elsa! Psst."
The eight-year-old princess with beautiful blonde hair didn't respond, still sleeping. Her sister, a five-year-old girl with auburn hair, got on the bed and leaned on her. "Wake up. Wake up. Wake up," the younger princess whispered.
This woke up Elsa. "Anna, go back to sleep," she muttered.
But Anna laid on the bed so she was looking at the ceiling. "I just can't," she said, talking like a drama queen. "The sky's awake, so I'm awake, so we have to play."
"Go play by yourself," Elsa said, shoving Anna off her bed as she tried to get to sleep.
Anna sighed in defeat, but then an idea appeared in her head. She got back on the bed and lifted one of Elsa's eyelids, uttering a special codephrase only the two sisters knew.
"Do you want to build a snowman?"
A few minutes later, Anna and Elsa arrived in the ballroom. "Do the magic! Do the magic!" Anna gleefully exclaimed.
With a small laugh, Elsa waved her hands together. Snowflakes suddenly burst forth and danced between her palms, forming a snowball. She threw the snowball high into the air, and snow bursted out and flurried around the room.
Anna danced around the room, catching snowflakes in her palms and mouth. "This is amazing!" she exclaimed.
"Watch this!" Elsa said. She stomped her foot and a layer of ice suddenly coated the floor, forming a giant ice rink. Anna slid off, laughing.
And so, Anna and Elsa had fun playing in the magically-created snow. They built a snowman together, named it 'Olaf', and danced with it across the ice floor. They even slid down snowbanks together. But then, something happened when Anna started jumping from one snow peak to another.
"Again! Again!" Anna exclaimed as she jumped faster.
"Slow down!" Elsa replied, struggling to keep up. Then everything happened so sudden.
Elsa accidentally slipped on the ice as she fired an icy blast. But before it could hit Anna, a burst of fire emerged from her body. The fire accidentally hit Elsa in the head, knocking her unconscious.
Anna tumbles down a snowbank and landed on her bum. "Elsa?" she asked, worried. She ran over to her sister and held her in her arms. Without warning, a streak of Elsa's platinum blonde hair turned redish. The younger sister gasped as all the ice and snow melted instantly, even destroying Olaf.
The doors slammed open. Anna looked up, seeing her parents, the King and Queen, rush towards her. "Anna?" the Queen asked.
Anna didn't respond. Instead, she dropped Elsa and ran out of the room, leaving a trail of cinders where she stepped.
Confused, the King and Queen went over to a deep valley, where a group of trolls lived. The eldest troll, presumably the leader, spoke up upon seeing the unconscious princess. "So you're saying Anna did this?" he said. "Was she born with those fire powers or cursed?"
"I think she was born with them," the King answered. "She hasn't shown signs of them until now."
The head troll motioned for the Queen to bring Elsa to him. When she did, he examined her. "You are lucky it wasn't her heart," the head troll said. "The heart is not so easily changed, but the head can be persuaded."
"Do what you must," the King said.
The head troll moved aside Elsa's bangs, revealing a black burnt mark on her forehead. "I recommend we remove all fire magic," he said, applying healing magic to the injury. "Unfortunately, I can't undo the burnt mark. But she will be okay."
"What about Anna?" the Queen asked.
"Like Elsa, Anna's power will only grow," the head troll answered. "There is great danger in her magic, but also warmth and happiness. She must learn to control it. Anger will be her enemy."
"We'll protect her," the King reassured. "She can learn to control it, much like her sister."
But back in the castle, Anna had locked herself in an unused bedroom. She could feel fire emerging from within. "I have to stay here," she thought. The younger princess clenched her hands, bright flames appearing in her fists. A lone thought appeared in her head.
"Why is Elsa the lucky one?"
The next day, Anna walked over to the window. She smiled up at the sight of the snow and rushed down the hall. Upon arriving at Anna's new bedroom, Elsa quickly knocked on the door three times.
Don't you want to build a snowman?
Come on, let's have some fun!
I never see you anymore
Come out the door
It's like you've gone away
We used to be best buddies
And now we're not
I just want to see you smile!
Don't you want to build a snowman?
It doesn't have to be a snowman...
"LEAVE ME ALONE!" Anna shrieked.
Surprised by the sudden outburst, Elsa left without saying another word.
Later that day, the Queen carried a sandwich over to Anna's room. "Anna?" she asked, placing the sandwich by the door. "Are you hungry? I brought you a cheese sandwich." She smiled. "I know it's your favorite."
Anna did respond to that, but she quickly opened the door, took the sandwich, and locked the door shut once again. She didn't even thank her mother.
Four Years Later...
Elsa knocked on the door to Anna's bedroom again, hoping for a response this time. But this time, a snowman was with her, the exact same snowman that was named Olaf. The only differences were that he was alive and a little flurry cloud floated above him.
Don't you want to build a snowman?
Or work on some geometry?
I think some company is overdue
I've made a snow buddy
So I won't go insane!
It gets a little lonely
All these empty rooms
Just watching the hours tick by...
But there was still no response, and Elsa frowned at that. "Aw, cheer up, Elsa," Olaf said. "She's probably resting."
Six Years Later...
It was already nighttime, and Elsa returned to the door, wearing black clothing. She raised her hand to knock, but she hesitated.
"Go on," Olaf said with a small smile.
Elsa looked at Olaf. "But..." she began.
"Maybe she'll respond this time," Olaf figured.
Sighing, Elsa sadly knocked on the door, tears coming from her eyes. "Anna?"
Please I know you're in there
People are asking where you've been
They say, 'have courage' and I'm trying to
I'm right out here for you
Just let me in
Elsa slid down the door and sat with her head against it.
We only have each other
It's just you and me
What are we gonna do?
Olaf patted Elsa's shoulder, trying to comfort her.
Don't you know how much I love you?
Anna didn't respond. She was in her room, laying on the ground in despair. She was thin and pale, dark circles under her eyes. Her hair was disheveled and she still wore the nightgown she wore when she was five years old, but it was stretched and ripped, miraculously fitting her grown body. She was surrounded by dark ash, and the whole room was burnt. But her sadness wasn't what made her quiet.
The fire princess didn't answer because she had grown to hate her older sister.