Hi! This is my Merlin fic. What if Arthur had a little sister? But his sister had special magic powers?

Warning: Some innuendo and language but not in the first few chapters because they are still innocent children then. And violence (obviously).

The reason this isn't a crossover fic with Frozen is because it is kind of basically an OC fic with an inspiration from a character from another thing.

Disclaimer: I don't own Merlin. BBC does. I don't really own Elsa. Disney does.

Well that was boring. Let's get started now.

Little Elsa skipped along, her platinum blonde hair shining in the sunlight. "Arthur! Arthur, come on" She called back to her half-brother. Elsa was younger than her brother, and at only six years old, she always seemed to need the company of Arthur, who was nine.

And then there was Morgana. Elsa found her very cold, But she didn't blame Morgana, because, at only age ten, her father died fighting for Camelot, leaving her in the custody of Elsa and Arthur's father, Uther.

"Elsa, not all of us can skip as fast as you," Arthur complained. He, on the other hand, didn't hate his half-sister's company; it just got on his nerves when she could do something better than him.

"Well you should learn to then," She gleefully replied. Uther had planned a picnic for Arthur and Elsa to get to know Morgana, seeing as she had just come to Camelot after her father's death. So far it wasn't going very well, and they were only just getting there. Morgana had her head down, and she hadn't spoken the entire way there. Uther laid a blanket down on the grass, and the four of them sat in silence for a while.

"Well then, let's eat." Uther said. They got the food out and ate some, then sat in silence for a while longer. "I am going to go take a walk. You children…do something. Anything." He murmured and walked off. He didn't go far. Secretly, Uther watched them from behind some trees, hoping that Morgana would finally begin to talk or at least do something.

"Arthur, let's play a game." Elsa said.

"Alright Elsa. What game should we play?" Arthur replied.

"We should play hide and seek," Elsa answered.

"Hide and seek is no fun with only two people."

"Morgana can play." Elsa said walking over to Morgana. Morgana looked up and saw Elsa's sweet eyes begging her to play.

"Please Morgana. Pleeeease." Elsa and Arthur said simultaneously.

"Fine. But don't expect me to play your silly little childish games with you all the time," Morgana said. Uther sighed from where he was standing. Finally Morgana had started to talk to someone.

"I'll be it," Arthur said. "I will count to thirty and you better be hidden." Morgana ran to the left, where Uther was. She crashed into him, and was not very happy.

"Hey Elsa and Arthur, look who's been spying on us this whole time," Morgana said, definitely not amused. She took Uther by the arm and basically dragged him back to the clearing Arthur and the picnic were. Elsa was still there, seeing as she couldn't find a place to hide. "Now, Uther, tell us why you were spying on us." She continued, eyes fading in colour by the second.

"Uh… well…I can explain," Uther said. Wow, getting embarrassed in front of his own children. That was a first. Morgana glared at him and Arthur didn't look so happy either. Elsa just looked confused. "Okay, fine. I wanted you to start talking or doing something. So I waited for you to do something, and you did. Is that not good?"

Morgana looked very disappointed in Uther. "Let's just go." She said coldly. Uther then started to fold up the red and gold picnic blanket and put away the food. Elsa sighed. She didn't want to go home. Arthur wasn't too disappointed, just wondered why Morgana was taking it so seriously. The children mounted their horses first, and Uther followed after the guards. They all rode through the green forest that now seemed much darker than it was when they rode there.

After they arrived back in Camelot, Elsa decided to go visit Gaius. He was the only one who knew of Elsa's powers, and had helped her control them. Her powers hadn't been very strong, and they still weren't even now after five years. Gaius was worried they would grow.

Elsa knocked on Gaius's door. "Come in," he said. She pushed the door and it creaked loudly as it opened. "Ah Elsa. How are you?"

"I'm alright." Elsa said and jumped up and sat on a stool, swinging her legs back and forth beneath it. "I'm just wondering about Morgana. Can you tell me anything about her? She isn't very nice."

"Morgana is a good girl. Just let her get used to it here and she won't be so mean," Gaius said. "Well then, other than that, how are your powers doing?"

"Oh…It is getting harder and harder by the day to control them. I can't let anyone see. You know what my father would do to me."

"Maybe this will help." Gaius pulled out a silver and blue bracelet and handed it to Elsa. "Wear this and it will help conceal your powers. But be warned, it will not hide them fully. It will stop you from having outbursts of magic, but you will still be able to use your powers when you choose.

"Thank you Gaius. It's very pretty. I will wear it always." She hopped down of the stool and made her way to the door. Before she could open it, Gaius said one more thing.

"Just tell me if you need anything, okay." Elsa nodded and walked out of the room.

After the day finished, Elsa went to sleep, but was awoken by strange noises in the middle of the night. It was the sound of things crashing and people yelling at each other. Elsa reluctantly got out of her bed to try and see what was going on. She slowly crept towards the door, her long blue nightgown trailing behind her. Then the warning bell began to ring, and she got scared. Slowly, she opened the door a crack, looked out and saw Morgana and Arthur being dragged away by people she had never seen before.

"You are coming with us child," said one of the men. They had found her, and she was very scared.

"Please don't hurt me," she said and began to cry. One of the men hit her and she cried even more. They shoved a drink into her mouth and she swallowed, not wanting to choke. The drink knocked her out instantly.

She woke up in a dungeon. As she opened her eyes she saw a face. A face she knew very well. "Arthur!" She nearly yelled.

"Shhhhh. We don't want to be caught talking. But you are okay now. You are safe here with me and Morgana." Arthur replied. Elsa looked around, and, as Arthur had said, Morgana was there, sitting in a corner looking very bored but deep in thought.

"Yes. And I know just the way to get us out of here," said Morgana, a gleam in her eye.

Please R&R. Constructive criticism is fine, but please, don't hate.

So I will try and update this every other day, but I don't think that will ever happen, but don't worry. The most I'll leave you for is a month. Ideas are gladly accepted. I need ideas!