Some sort of disclaimer that Disney owns the characters presented in this educational, not-for-profit piece and that this representation is purely my own/not endorsed by Disney
While legends claimed that the royal bloodline of Arendelle has long been intertwined with magic, generations had passed since any appearance of the supernatural. Eventually, it carried little more significance than a story to tell the town's children. That is until the King and Queen gave birth to their first daughter Princess Elsa. It was clear from the beginning that Elsa was different. Unlike her brunette mother and blonde father, Elsa's hair was a dazzling platinum. It soon became clear that the legends carried more weight than they had been given credit for. Although, the royal family kept it a secret to the public, magic had returned to Arendelle.
Fearful of evildoers who may try to manipulate Elsa's magic, the King and Queen had to keep her in the castle until she learned to control her powers. However, they still hoped that Elsa would have a normal childhood. Well, as normal as any child who could shoot snow and ice from her fingertips could have while being trapped in a castle. In order to bring Elsa company and avoid the risk of another magical child, the King and Queen adopted an orphan named Anita who they had met and come to adore on a diplomatic trip to the kingdom of Turia.
Elsa and Anita quickly became best friends. They loved to explore the halls of the castle and their favorite thing to do was make snowmen together using Elsa's powers. However, one day as they were playing, Elsa accidentally shot Anita with her magic while attempting to brace her fall. A platinum streak immediately developed in Anita's otherwise dark hair and she fell gravely ill.
The King and Queen had always feared that this may happen, but they had hoped that allowing Elsa free rein over her powers would allow her to control them more easily. They took the daughters to the Valley of the Living Rock, where the royal family had first encountered magic centuries ago.
"Please, we need help! My daughter!" The King called out into an empty valley, only filled with rocks. The rocks slowly began to shake and unfold to reveal that the heads and bodies of trolls. The Grand Pabbie of the trolls, approached the royal family and began to examine Anita.
"You are lucky it wasn't her heart. The heart is not so easily changed, but the head can be persuaded." The Grand Pabbie announced.
"Do what you must." The King solemnly replied.
"I recommend we remove all magic, even memories of magic to be safe. But don't worry, I'll leave the fun. She will be okay." The Grand Pabbie pulled out a shining blue orb of energy from Anna's head, on which her memories played out, and replaced the magical ones with ordinary scenes. "Listen to me, Elsa, your power will only grow. There is beauty in your magic but also great danger. You must learn to control it. Fear will be your enemy."
Elsa was taken aback, unsure of what to say.
"No. We'll protect her. She can learn to control it. I'm sure" The King declared with false confidence. "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 Anita."
Over the next few months, Arendelle began to close off from the rest of the world. Within the castle, Anita and Elsa are split into separate bedrooms. Anita couldn't understand what had changed, but Elsa never wanted to play with her anymore.
One day, on a journey at sea, the King and Queen's ship was engulfed by a raging sea and lost to the waters. Elsa and Anita were left to share the castle alone but not together.