I don´t own any of the Frozen rights/characters/story nor the Rise of the Guardians'. They do all belong to Disney.
PROLOGUE
The night she was born was an icy one. The wind blew with all of its force outside, and a blizzard was hitting the misty kingdom of Arendelle. Indoors the castle, the king was anxiously walking up and down the corridor, waiting for the doctor who was attending his wife to call him into the room. The windows trembled, and he couldn't help but look through them.
-Your Highness…?
The king nervously turned to the doctor, who had silently appeared in the corridor.
-How is…? - He started, but the doctor rose his hand to gently stop his king.
-The queen is fine.-he smiled, warmly.-And… It's a girl.
The king stared at the doctor for a while, not knowing what to say.
-Her mother asks you if you like Elsa to be her name.-continued the doctor, patiently.
-Y…Yes.-mumbled the king. - I'd love to call her Elsa.
The doctor nodded, and the king let a great sigh slip from his mouth. Finally, he grinned.
-May I see them?
-Of course, my king. –the doctor entered the room followed by the king, and let the two of them alone. The queen was resting, holding a little baby asleep in her arms. The king ran to his wife and kissed her on her forehead. She smiled with a weak but happy smile, and looked at the baby.
-Want to hold your daughter?-she whispered, and run her hand through the baby's hair.-Looks like she has somebody's blonde hair…
The king felt the weight of the world on his shoulders as he contemplated his daughter. Her mother was right: she had blonde reflections on her almost inexistent hair, and also was as pale skinned as he was. The queen let him hold her, and when he cuddled her up, she opened her eyes. The king rose his eyebrows in surprise, and tenderly kissed her as he had done with her mother.
-Hi Elsa…This is your dad here.-he said, his voice almost cracking.-Looks like she has somebody's eyes…
Her mother smiled again.
-I was going to tell you that later…
-She's… beautiful.-the king said. – In fact, I would say her eyes are a little bit bluer than yours.
-It's too early to say, but yes. - The baby made some noise and raised her hand to her father. He gladly leaned forward to her, and her warm fingers touched his nose. Suddenly, the king noticed cold and tried to move his nose to remove the feeling, but it didn't go away.
-What…?-he said, and glanced at his wife, who was silently glaring at him in shock.
-She…she froze your nose…
Incapable of moving it, he handed the baby back to her mother, incredulous, and touched it himself. As his wife had told him, it was ice cold, slippery, and slowly melting to his body heat.
The king and the queen exchanged looks. He definitely didn't know what to say or do, and she looked way concerned.
-We have to talk to the trolls.-She said.-They didn't see this coming? Why did we not see this coming? My own sister had freezing powers and I didn't even expect it to be a familiar…gift!
-We will talk to the trolls, sweetheart. But you know what?-he sat next to her and hugged her.- We won't let this destroy her, as it happened to your sister. This will be a gift, not a curse, right?
The queen glared lovingly at her daughter.
-Of course it will be.-a tiny snowflake flew across the room, and she hold her baby against her tighter.