Author's Note: Heh, well here I am, writing a Sailor Moon/Harry Potter Crossover. My favorite kind of these crossovers is the "Sailor-Senshi-go-to-Hogwarts" fic, and I see a ton of those. I wanted to write my own, of course, since I like this genre so much. However, not one of those fics that I saw starred the Sailor Quartet, who are four of my favorite Senshi. So, I decided to make a "Sailor-Quartet-go-to-Hogwarts" fic. This story takes place in Harry's third year.

Summary: The Sailor Quartet are enjoying a day out when they receive word that Voldemort killed the entire Royal family. Wait…what? Isn't Voldemort dead? And what happened to Harry Potter? It's up to the Quartet to investigate and prevent this…

Disclaimer: I do NOT own Harry Potter or Sailor Moon. If I did, what would I be doing writing FANfiction?

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Prologue

"No, no, no!" Vesves roared angrily as the words "Game over" flashed on the screen of the video game she was playing. "Argh! I was just about to beat this level!"

"That's what you say just about every time," Cerecere remarked, examining her newly manicured fingernails. The pinkette scowled when she noticed a hangnail.

"But I'm in tenth place," Vesves replied hoarsely, staring at the high score list. "And I was just about to beat my own score. I'm in tenth place, look!"

Pallapalla clapped. She was the only one who did. "Congratulations!" she squealed happily. No one paid attention to her.

"Want to do something else?" Junjun suggested, leaning on the video machine as she watched her redheaded sister start a new game.

"No," replied Ves, not taking her eyes off the game. "Pallapalla got her ice cream, Cerecere got her manicure, and you got your bike ride, so now you all have to watch me play Sailor V!"

The Sailor Quartet was taking a day out. Princess Lady Serenity, or Chibiusa as she was often called, was staying in the Palace for some training with her mother, so she couldn't come along. The Quartet had decided to do four activities, one that suited the interests of each member. They were currently in the Game Center, one of the only things from twentieth-century Tokyo that remained in Crystal Tokyo. And the ever-popular Sailor V game was a classic.

Cerecere, Junjun, and Pallapalla continued to watch in silence as Vesves came closer and closer to beating ninth place. Each time she lost, she swore at the screen, and one time actually feigned punching it.

"I'm going next door to get myself a sandwich," Cerecere said, before walking out the Game Center and heading to the sandwich place next door.

"Ooh! Pallapalla wants a sandwich, too!" Pallapalla suddenly cried, racing after her sister.

A few minutes passed. Junjun remained in the Game Center to keep Vesves company. All of a sudden, their Senshi communicators, which they kept on at all times, started beeping signaling an emergency. Vesves let out a startled yell, followed by a string of swear words as "Game over" once again flashed on the screen.

Junjun opened her communicator to see Chibiusa's face on the small screen. She was wearing her sailor fuku, and the expression on her face told the Senshi of Energy that the situation was urgent.

"Okay, I don't have much time to explain this," said Sailor Neo Moon quickly. "Mother told me to tell you all to go to Sailor Pluto at the Gates of Time. She'll explain everything. Don't come to the palace."

"Wait, what?" Junjun's head was spinning. "Explain what?"

"Why can't we go to the palace?" Vesves demanded. "What's going on?"

"Look, I have to go," Neo Moon replied. "Pluto will—"

"Avada kedavra!"

Suddenly, the small screen on the communicator flashed green. Sailor Neo Moon screamed, and the image faded. Vesves and Junjun stared at it in shock, trying to process what just happened.

"What…"

"…The hell…"

"…Was that?"

Cerecere and Pallapalla ran in the Game Center, with worried expressions etched on their faces.

"What was that all about?" Cerecere demanded, looking from Vesves to Junjun.

"Pallapalla is scared for the Princess!" Pallapalla quipped. She was visibly shaking.

A tense silence followed, broken by Cerecere. "Let's find a place to transform," she said in a low voice. The other three nodded and followed her outside and into an alleyway. With that, the four of them pulled out their henshin sticks.

"CERES POWER, MAKE UP!"

"PALLAS POWER, MAKE UP!"

"JUNO POWER, MAKE UP!"

"VESTA POWER, MAKE UP!"

In a flash of pink, blue, green, and red, Cerecere, Pallapalla, Junjun, and Vesves were gone. In their places stood Sailors Ceres, Pallas, Juno, and Vesta.

"Can we manage Sailor Teleport without Sailor Neo Moon?" Sailor Vesta questioned.

"What other way is there for us to get to the Gates of Time?" Sailor Ceres replied, as the Sailor Quartet reached for each other's hands.

"SAILOR TELEPORT!" In a whirlwind of light and dust, the four Senshi vanished from the streets of Crystal Tokyo and landed safely next to the Gates of Time. They were all tired from the effort of teleporting without Neo Moon to aid them.

"Ceres. Pallas. Juno. Vesta."

The four Senshi in question looked up to see Sailor Pluto standing over them. She had a solemn expression on her face. The Quartet stared at her in silence, almost as if they knew what was coming. Ceres was the first to voice it.

"Princess Lady Serenity is dead, isn't she?"

Sailor Pluto lowered her gaze. Tears formed in her garnet-colored eyes. "Yes. I'm afraid so."

This got different reactions from all four of them. Ceres clapped a hand over her mouth, eyes widening in shock. Pallas sniffled, and then started crying like she'd never cried before. Juno lowered her gaze, mostly to keep anyone from seeing her cry too. Vesta stood up, her gloved hands clenched into fists, muttering, "I'll kill whoever killed her, mark my words!"

"What about the queen?" Juno demanded, looking up as Pluto watched them in silence. Again, the Senshi of Time had to break the bad news.

"Neo Queen Serenity's dead, too. And the king."

"Seriously?" Ceres gasped in shock. Pallas cried harder, if that was even possible. Vesta glanced at everyone, hoping for someone to say "April fool!" or "Haha, just kidding!" When no one did, she swore and turned towards the empty space behind them all.

"SACRED BLAZE!" the Senshi of the Hearth cried. A column of fire shot from her hands and into the empty space. No one even tried to scold her about the dangers of shooting fire in empty space.

"There has to be something we can do!" Juno pleaded.

Pluto glanced at the Gates of Time, then back at them. "Well…"

"Well what?" Vesta demanded, whirling around to face Pluto.

"This wasn't supposed to happen."

Another shocked silence followed Pluto's words, broken only by Vesta's reply of "Well, of course it wasn't!"

Pluto ignored her. "The man who killed the Royal Family is known as Lord Voldemort. He was supposed to die many years ago, in the twentieth century, but the time stream had changed. The person supposed to have killed him died mysteriously in 1993. I do not know what killed him yet, but I can tell that it was not supposed to be there."

Ceres stood up abruptly. "We'll find it!"

Vesta cracked her knuckles. "And destroy it," she added in a fiery tone.

Pallas sniffled, recovering slightly. "Pallas will do what she has to in order to protect the Princess."

Pluto thought for a minute, while the Quartet looked to each other, with determined expressions on their faces. None of them had any doubts—except Juno.

"Well," she said softly. "This Voldemort person killed Neo Queen Serenity, for the moon's sake. How are we, four inexperienced soldiers in training, supposed to stop him? And where are the Guardian Senshi?"

Pluto did not answer this. Juno and the others got the message.

Ceres spoke first. "How can someone kill powerful, experienced warriors with two words?"

"Magic," Pluto finally replied solemnly. "There is a whole world out there of witches and wizards. They use a different kind of magic than the Senshi do." Suddenly, an idea dawned on her. "There is a way, though. Perhaps if you four learn the kind of magic in their world, you may be able to stop this threat in its tracks."

"Anything!" Ceres pleaded.

"Even if it means going to a school!" Vesta added.

For the first time that day, Pluto smiled. "That's exactly where you'll be going—to Hogwarts School of Witchcraft and Wizardry in 1993. I'll send a message to Albus Dumbledore, and tell him that you four are a special case. Only he will know the truth. You four will be Japanese exchange students, and you will go by your real names."

"Anything else?" Juno questioned.

Pluto nodded. "Your main task will be to protect Harry Potter from whatever killed him in 1993."

"Will you come with us?" Pallas asked.

Pluto shook her head. "I'm afraid not. I have to protect the Gates from any more temporal anomalies. You four will have to go alone."

Vesta glanced at everyone. "Well, what are we waiting for? I say let's do this!"

"Me, too!" Ceres agreed, nodding enthusiastically. "Even if it means going to a school."

"We'll do our best," Juno vowed.

"For Crystal Tokyo!" Pallas cried, her tiny voice echoing throughout the space.

"Stand in a line," Pluto instructed. The four did so, and the Senshi of Time pointed the Garnet Rod towards them. Eventually, the Garnet Rod began to glow, encasing the Quartet in a brilliant crimson light.

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Author's Note: So, how was that? I know exactly which Houses they are all going to end up in, but I'm going to need ideas for wands. Reviews are appreciated, but no flames, please!