Chapter 1

It was a sunny day in Arendale. A few weeks passed since the eventful adventure. Princess Anna was running around in the castle. "Anna, stop this, I am trying to work," spoke Elsa as Anna ran into her sister's room.

"Anna, what is going on?" asked the older sister.

"Elsa, can we play? Kristoff left to see the trolls, and I am really bored," spoke Anna as she looked at her sister.

"Anna, I am sorry but I have work to do," spoke Elsa as she continued to read the documents that lay before her.

"You are no fun," spoke Anna as she took a step towards Elsa but accidentally lost balance and fell.

"Ouch," spoke Anna as she hit a drawer, and accidentally opened it.

"Anna, are you alright?" spoke Elsa as she stood up from her chair and looked at her sister.

"I am fine, I guess," spoke Anna as she prepared to close the drawer, but saw a small diary in it. The young woman took the book and opened it.

"Elsa, look, this is a diary written by our grandmother," spoke Anna as Elsa leaned forward, looking at the diary.

"It has been years since I saw my youngest child, but I have not heard of her since the storm. I lost my husband, and my daughter that night. I must not give up on searching for them," read Elsa.

"We have an Aunt? Why has father never told us about her?" spoke Anna

"I think that father might actually not have known. Known our grandmother, he might not have wished to burden our father with knowledge of that she had a younger sister who had not survived that storm,"

"But that means,"

"Yes, I think we need to speak with Grand Pabbie," spoke Elsa as she stood up approached the door.

"Elsa, what about your work?" questioned Anna.

"Work will have to wait. If it is possible that our aunt actually survived, we need to make sure to find that out," spoke Elsa as she exited the doorway, Anna following her. The two sisters walked to the stables, where they took the horses and rode to see the Trolls.

"Hello Elsa, Anna," spoke Grand Pabbie when he saw the two royal women approaching their land.

"It's good to see you again," smiled Anna

"I can see that something bothers you. What is it Elsa?" asked the troll.

"We found out that we had an Aunt, who might have survived," spoke Elsa

"Ah yes, lovely Lily. She was a kind girl with fiery and feisty temper; somewhat resembling young Anna, if what Kristoff told us is true. Yes, after the incident, your grandmother asked me to remove memories of her youngest child from Agdar, so that your father would not know about this tragedy,"

"Do you know if we can find her?"

The troll paused. "I remember a week ago Kristoff purchased some necklace in the village, and I think it has some magical properties," spoke the troll as Kristoff arrived.

"Hello Grand Pabbie, o, hey Anna, Queen Elsa," spoke Kristoff

"Please, stop with formalities Kristoff, I might be Queen, but I am also your girlfriend's older sister," spoke the Queen.

"Kristoff, I told the Elsa that you bought some necklace a week ago,"

"What? Yes, I remember, I tried to find some gift that," began Kristoff as he looked at Anna and blushed. Elsa shook her head, as the two lovebirds blushed.

"Can I take a look?" asked the troll. After Kristoff gave him the necklace, the troll examined it.

"Yes, it is indeed a magical necklace. It can help find people. Put your hand on it, and I will help you," spoke Grand Pabbie as Elsa put her hand on the necklace.

The troll touched the necklace first, and then Elsa's hand before saying some phrase. An image appeared before them of a house. "The spell detected that she lives at that address

"Four Privet Drive, huh? I wonder where this is located," spoke Anna.

"Magic tells me this is in England. I can modify this necklace to serve as a temporary portal to get from here to there, so that you can visit your family," spoke Grand Pabbie as Elsa and Anna held the necklace.

"I, we will be back soon. I promise," spoke Anna as the two young women disappeared from sight.

When the royal sisters looked around, they saw very different surroundings. "OK, this place looks so weird," spoke Anna as the two sisters searched for the address.

"Let me speak first Anna, we don't know who else might leave in this house," spoke Elsa as she led her sister to one house and then knocked on the door.

A fat man opened the door. "Get lost," spoke he before the man realized who stood before him.

"Petunia," screamed the man

"What is it, dear?" spoke a female voice

"We are in a big trouble," spoke the man, as he helped the two ladies enter his house.

"This man is so weird, I mean, common, why would he be afraid of two strangers he never met, unless," spoke Anna as she tried not to laugh.

"Queen Elsa of Arendale, Princess Anna of Arendale, it is a pleasure to meet you," spoke the fat man as he led the two women to the living room.

"What is it Vernon?" asked Petunia as she entered the living room before freezing in her place.

"Could you tell us what is going on?" asked Elsa

"You, you, Your Majesty, everyone in the world knows whom you are because of an incident that occurred a few weeks ago," spoke the man as he observed the two royal women.

"We don't want to bother you. We just learned that Lily, our Aunt lives at this address," spoke Elsa.

"My sister is dead!" spoke Petunia quickly.

"I did not know Aunt Lily had another sister," spoke Anna

"No, she was my adoptive sister. My parents were on the beach one night, and they found a shipwreck survivor with a young girl. Before he died, he said that the girl's name was Lily," spoke Petunia. Elsa could feel tensions rise in the room.

"Elsa, the necklace is broken. We are so sorry, but we thought that Aunt Lily lived here. We hoped to meet with her," spoke Anna as two boys entered the room. One was chasing and bullying the other.

"What's going on here?" asked Elsa as she created a small ice wall between the two boys. When she was sure that the bully would not chase the other boy, Elsa instantly thawed the ice.

Everyone was stunned, but mostly the thin boy. "Bullying is not nice, apologize," spoke Anna as she approached the other boy.

"My cousin deserved it!" spoke the fat boy as Anna glared at him.

"Cousin? Are you by any chance related to Lily, the adopted sister of Petunia?" asked Elsa, as Harry still did not know what to say.

"My name is Harry Potter. Lily Evans was my mother," Harry reasoned he made a mistake, as Anna jumped and put Harry in a hug.

"I can see that your treatment of Harry is really bad, so I decided to take him with me. I am sure that anyone learns how you treated Harry; you would be in big trouble. That is, if he wants to come with us," spoke Elsa.

"Fine, just make sure he does not come back to us anymore. Good riddance. Take your bag and leave," spoke Vernon as Harry quickly journeyed upstairs to get his bag.

"Are you ready?" asked Anna when she saw that her fifteen years old cousin had his large trunk with him.

"Yeah. I always dreamed to find somewhere else to live," spoke Harry, as he still did not know what to say.

"Well, of we go," spoke Anna as the three people left the house, "That's a strange pet you have,"

"Her name is Hedwig, she is my messenger owl," spoke Harry, "Is it true, are you really Queen Elsa of Arendale?"

"Yes, and you are our cousin. Our small family will finally be fully reunited," smiled Anna as the three people walked on the street.

Suddenly, Anna felt coldness. "Elsa?"

"I am not doing anything," spoke Elsa as she looked around. Two tall figures with dark robes and hoods appeared before them.

"Expecto Patronum," spoke Harry, at the same time as Elsa shot ice at the two monsters. The two instantly retreated.

"Why are Dementors here?" thought Harry as he looked at his older cousin.

A magical letter appeared before the group. "Harry Potter, you performed magic in front of a Muggle. You must await your trial, which will be held in a few days," spoke the howler before it disappeared.

"Let's not stay and find out who else plans to attack us," spoke Elsa as she took out the necklace and put her hand on it. She then held Anna's hand, who held Harry's one and the three disappeared.

"Welcome to Arendale Harry Potter," spoke Elsa as Harry looked around.

He saw a troll. "Hello son of Lily," spoke Grand Pabbie.

"Don't worry, this is Gran Pabbie. He is a troll. He is the leader of the trolls who live here; they are the Kristoff's family," spoke Anna as Kristoff arrived.

"Anna," spoke the man as he then saw the newly arrived person, "Hello my name is Kristoff,"

"My name is Harry Potter," spoke Harry.

"Anna, since you were so bored not so long ago, you should go spend time with Kristoff," spoke Elsa

"Oh no, you don't. I want to show the palace to Harry as well. Don't worry, Kristoff will come with us," spoke Anna as Elsa sighed. Elsa found the two horses on which the two sisters traveled. Elsa sat on the first; Harry sat on he other, while Kristoff and Anna rode on Sven.

"Wow, you have such a beautiful castle here," spoke Harry as the group entered the Castle Gates.

"Well, this is your castle too, you know, since you are our cousin," smiled Anna as the group entered the castle.

"Hello, I am Olaf, and I like warm hugs," spoke the snowman as he looked at the group. "Who is this dark haired guy? I have not seen him here before,"

"Olaf, this is Harry Potter, he is our cousin," spoke Elsa

"Harry Potter?" questioned the snowman before he saw Hedwig.

"Is that an owl also made of snow?" wondered Olaf.

"No, Olaf, this is a regular owl," smiled Elsa

"Okay, see you," spoke Olaf as he ran away.

"I know that magic exists, but talking snowmen?" wondered Harry

"Harry, you should have seen Marshmallow," giggled Anna as Elsa looked at her sister.

"Queen Elsa, I see you returned. Was your trip successful?" spoke Kai as he approached the room.

"Yes, meet Harry, our cousin," spoke Elsa

"Hello, my name is Harry Potter,"

"Please help him settle in the largest guestroom on the floor next to the royal bedrooms," spoke Elsa

"Kai will help you settle Harry. Now, if you excuse me, I have work to do," spoke Elsa as she left.

The rest of the group traveled to the guest room. After Kai opened the door, Harry gasped. The room was huge; it was way bigger than the largest room in Privet Drive. "This is your room, your Highness," spoke Kai but Harry did not respond.

"Prince Harry?" asked Kai

"I am Harry, not Prince Harry," protested Harry Potter.

"Young Prince, your mother was our former King's younger sister, which makes you Queen Elsa and Princess Anna's cousin, and Prince," spoke Kai as he helped to put the trunk in the room.

"Prince Harry, I will let the other servants know to prepare you room," spoke Kai.

"Wonderful. Say, would you like to spend time with me and Kristoff," spoke Anna as Harry nodded. He could not believe his luck. It had to be a dream. If it was, he planned to fully enjoy it.

Later, on Privet Drive Auror Tonks looked around, but saw no sign of Harry Potter. An older Wizard approached her. "Remus, tell Professor Dumbledore that Harry disappeared," spoke Tonks as the apparated away to her home, while Remus Lupin apparated to find Dumbledore.

A/N: I know this chapter might have been a bit cheesy, but I wanted to write a plausible crossover start, where Harry is Elsa's cousin, and the way Elsa found him. This will follow book 5, but the plot will become more AU as the story progresses.