A.N. This is a crossover between Sailor Moon and Harry Potter. Not very original I know, but I really wanted to make one. I know I like them!

Disclaimer: I do not own Sailor Moon or Harry Potter, however, that doesn't mean I wouldn't like to.

The School Of Cosmos

The Entrance and The Youma

Harry Potter, Ronald Weasley and Hermione Granger sat in the Great Hall of Hogwarts School of Witchcraft and Wizardry.

"When are they going to finish the sorting? I'm hungry!" complained Ron.

"Oh Ron! There's only a few students left! It'll be over within five minutes!" said an exasperated Hermione. Harry just sighed.

"Well, I wish they'd hurry up!" defended Ron.

As the last person was sorted, Professor Dumbledore stood up and was about to make a speech when a bright light flashed from behind the front doors to the Hall. It was followed by a silence of about thirty seconds. All of the sudden, the doors burst open.

There was a figure standing in front of the doors with it's arms spread out. The person slowly put down it's arms and walked confidently to the Professors' table. You couldn't see it's face, as it was wearing a long cloak. By this time, all the teachers had out their wands, and they were pointed at the figure in black. It stopped right in front of Dumbledore, and said so that the whole hall could hear:

"I would like to enrol in this school."

"And might I ask what your surname is?" Dumbledore questioned politely.

"I have no surname. My only name is Cosmos." Replied the figure.

"I see." Replied the headmaster.

"So am I in the school or what?" asked the Cosmos, clearly annoyed.

"Well you aren't on the admittance list." said Dumbledore.

"Hey, I've come along way, so if you're not going to let me in, just say so!" snapped the figure.

"And how do we know you are not working for the Dark Lord?" asked Snape, suspiciously. At this comment, the hall filled with gasps and whispers. Harry paled considerably.

"Dark Lord? Who's this?" More whispers.

"The greatest evil that this planet has ever known," said Dumbledore seriously, "a wizard by the name of Voldemort."

At this name, Cosmos seemed to stifle a giggle. Snape glared at her.

"Whoa, old wise guy coming through." The figure replied.

"YOU MUST HAVE A MOST UNPOLITE MOTHER TO INSULT ALBUS DUMBLEDORE LIKE THAT!" Snape stood up and yelled at her.

At this the person opened it's palm and held it next to her hip. Harry was sure the person was going to slap him, but the figure did something quite unexpected. The open hand began to glow. At this, the person's hood fell down. It was a girl of about fifteen with long silver hair and deep blue eyes. A staff appeared in the girl's hand. At the end, there was a sphere, with little wings, and an eight pointed star on top. She twirled it a few times and then pointed it at Snape's face.

"Never insult my mother. She was more of a person than you'll ever be." Said Cosmos.

"And what exactly do you plan to do with that?" smirked Snape.

To everyone's surprise, the girl laughed. "In this staff, I have the greatest power imaginable."

She looked like she was going to continue when a monster appeared in the hall. Instinctively, everyone drew their wands and pointed them at the youma.

"So you got out of the Negaverse Umacrum. You were hardly be the one I thought would escape." Cosmos looked around and said in a bored voice: "Everyone put away your wands. They are no use against this type of demon." Everyone look shocked.

"Then how do we defeat it?" someone cried.

"You leave that up to me." Cosmos said as her staff disappeared. She took of her cloak to reveal muggle clothing; jeans and a tee, just to be specific.

"How do you intend to beat it?" someone else yelled.

"Simple," she said getting into a martial arts position, "I fight."

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A.N. This is my second fanfiction. I don't know if there are going to be any couple, but I do know that Cosmos is going to be Harry's friend. Well, 'till next time!