3 years later
Six year old Anna arose from her bed in a bout of excitement, for she had a great idea for some late night fun.

First, she went to go wake three year old Nora, who was bundled up safely in her lavender blankets. The six year old shook her awake.

Nora woke up with a tired yawn, before turning to her older sister; "Oh hi Anna," she said in small cute voice, still a little sleepy.

Anna whispered her plan to Nora, who smiled brightly at the plan and decided to follow Anna to their nine year old sister's bed.

"Elsa. Psst. Elsa!" Anna called, but she didn't answer. She clamored up onto bed first, and reach's over to help Nora up.

The young brunette and strawberry blonde started to shake Elsa, Nora doing it softly so as not to hurt her.

"Wake up, wake up, wake up!", Anna squealed, shaking her older sister awake. "Anna, Nora, go back to sleep," said Elsa with her eyes still closed.

Anna groaned dramatically and plopped herself on Elsa as Nora watched and laid right next to Elsa, still shaking her a little. "But we just can't. The sky's awake, so we're awake, so we have to go play" the strawberry blonde said dramatically.

"Go play by yourselves!", Elsa teasingly said gently pushing Anna off the bed, causing her to roll over and plop down on the floor.

Nora quickly jumped off the bed to check on her older sister. "You okay, Anna?", she asked softly making sure she wasn't injured.

"Yes, Nora, don't worry, I'm okay.", she reassured her little sister, and patted her head gently.

"How are we gonna get Elsa to pway (kiddy talk for play)?", Nora asked, pouting a bit. Anna thought for minute and got an even brighter idea, her face lighting up like a light bulb. She had figured out just what would get Elsa up.

Anna whispered the plan into Nora's ear, and she giggled excitedly, ready to commit to the plan.

They both climbed up Elsa's bed again, and whispered at the same time in her ear "Do you want to build a snowman?", this gets Elsa's attention as she grins.

Timeskip
"Come on, come on, come on!", Anna shouted rushing her sisters downstairs, and Nora couldn't help but giggle. Elsa had to shush them to be quiet so they wouldn't wake the castle's staff or worst, their parents- and that would spoil the fun.

They finally made it to the ballroom and that was where the fun could finally begin. "Do the Magic, do the Magic!!" Nora cheered, clapping her hands together excitedly.

Elsa focused her energy and...gestured her hands together to make a magical ball of snow and ice, Anna and Nora watching in amazement.

"You ready?" Elsa asked and to this her two younger sisters nodded excitedly. Elsa kept conjuring her magic, before finally releasing it into the ceiling making snowflakes rain down on the excited group.

The two young sisters cheered as they bounced up and down "This is amazing!" Anna clapped giggling along with Nora at the sight of all the snowflakes.

"Watch this!" Elsa exclaimed. Catching the young girls' attention, Elsa stomped her left foot onto the floor and frosted it into ice, Anna slid a bit and bursted into laughter.

Nora almost fell on the ice, but luckily was caught by Elsa "I gotcha", she assured her little sister year. Nora smiled sheepishly "Thanks Elsa," she said hugging her. Elsa just smiled warmly and hugged her back.

The three sisters skated hand in hand together on the icy floor, giggling quietly among themselves. Later Elsa built a snowman for Anna and Nora. "Hi, I'm Olaf and I like warm hugs," the snowman, voiced by Elsa said and waved to Anna and Nora. They both rushed over to hug the sweet snowman "We love you, Olaf" they squealed in unison, giggling.

Using her powers, Elsa helps Anna, Nora, and Olaf to slide across the ballroom floor as if they are dancing. Together they slid down the snowy hills Elsa had created.

Elsa decided to make snow peaks for Anna to jump on as Nora watches and cheers her on. "Hang on!", Anna jumped as Elsa made a snow peak from one to another as she jumped in pursuit.

"Catch me! Again!" Anna cheered as she kept jumping, but she was going too fast and Elsa couldn't keep up,"Wait!", Elsa exclaimed, "Slow down!", Nora joined in worried, but Anna didn't hear them.

Soon Elsa slipped, and so did Nora, Anna jumped up, but there was no snow peak to catch her, Elsa panicked as she blast out her magic to make another to catch her fall.

"Anna!", the two sisters shouted in worry, the blast hits Anna in the head, causing to fall down to the ground and was knocked out cold.

Elsa and Nora looked at each other in shock and worry and hurried to run and check on Anna. As soon as they got there, they noticed a white streak slowly appearing in Anna's hair.

Nora panicked and soon started to cry in anguish "Mama, Papa!", and so did Elsa, they held each other close with Anna in the embrace.

"It's okay, Anna, we got you!" Elsa said, still in tears, suddenly the doors opened, and they looked up to see their parents.

They ran towards the three sisters in panic and worry "Elsa, what have you done? This is getting out of hand!", Agnarr exclaimed.

"It was an accident, I'm sorry, Anna!", Elsa apologized, still holding her and Nora close, before Iduna picked Anna up and felt her head "She's ice cold!", she panicked.

"I know where we have to go!", Agnarr sternly and knowingly said.

Timeskip
The family rode on the horse marching straight to troll valley. Nora cradled close in between Elsa and her mother. "Mama, is Anna gonna be okay?" Nora asked, eyes overwhelmed with tears as she sniffled and yawned a bit getting tired.

"Don't worry, Nora, she'll be alright, how about you take nap, sweetie, you seem tired, and I promise by morning, she'll be alright, okay." Iduna assured as she used one hand to cradle her close, Nora nodded as her mother hummed the sweet lullaby of Ahtohallan to lull her to sleep, and it did the trick, soon she fell asleep on her mother's hip close to her lap, while her hand was still in Elsa's, she smiled at how cute her little sister could be anytime of day and through any bad times, but she couldn't help but worry bout Anna, she felt so guilty, and to make it even worst, what if she hurts Nora too, she wouldn't be able to forgive herself, if that happened.

Unbeknownst to Elsa, she left a trail of ice on the ground sparking the curiosity of a young Sámi iceboy, Kristoff and his baby reindeer, Sven, and so they decided to follow in pursuit.

Once they made it there, Agnarr with Anna in his arms pleaded for their help for Anna, soon stones came rolling down to reveal the trolls.

Kristoff gasped "Trolls...?", soon a troll named Bulda rolled behind him and Sven "Shush! 'm trying to listen.", she shushed them as Sven licked her cheek, and she took a glance at them and smiled "Cuties. I'm gonna keep you".

Grand Pabbie, the oldest troll ever and the head of the tribe appeared before the royal family "Your Majesty!", he greeted before taking Elsa's hand "Born with the powers or cursed?", he asked.

"Born, and they're getting stronger.", he answered as he kneeled to the head troll's level, so he can examine Anna, "You are lucky it wasn't her heart. The heart is not so easily changed, but the head can be persuaded.", he said.

"Do what you must!", Agnarr said to him, and soon Pabbie got to working, he touched Anna's forehead "I recommend we remove all magic, even memories of magic to be safe.", he said as he pulled out Anna's memories and altered them, and removing all the magical memories "But don't worry, I'll leave the fun.", he put all the memories back into her head as Anna smiled warmly in her coma.

"But she won't remember, I have powers?", Elsa asked, Agnarr looked at Elsa and sternly said "It's for the best.", he then turned to Nora "It's also best if Nora doesn't know too".

Grand Pappie nodded as Iduna brought Nora down to him as he touched her forehead altering her memories of Elsa's powers, but leaving the fun. Elsa watched sadly, she'll miss entertaining her sisters with her wonderful powers.

Afterwards Pabbie walked towards the sad snow princess "Listen to me, Elsa, your power will only grow. There is beauty in it.", he explained as he magically showed a silhouette of an adult Elsa creating magical snowflakes "But also great danger. You must learn to control it. Fear will be your enemy.", he further explained as the one of the snowflakes turns red and into icy spikes, and the spikes turn into human form which then attack the silhouette of adult Elsa, this frightens Elsa, she runs into her father's arms.

Agnarr was appalled, but he spoke firmly, while rubbing Elsa's back with one hand "No. We'll protect her. She can learn to control it. I'm sure. Until then, we'll lock the gates. We'll reduce the staff. We will limit her contact with people, and keep her powers hidden from everyone. Including Anna and Nora".

Anna and Nora wake up, the next morning to find Elsa's bed gone from their room, they rush into the hallway, and find Elsa going into her own room, they watched sadly as she looked back at them with the same expression, and silently closed the door behind her.