Title: Petunia's Fifth Year

Rating: K

Summary: Petunia Evans returns for her fifth year with all the insanity of a fifth year. Piles of homework, battle monsters, and the ups and downs of life! Sequel to Petunia's Fourth Year! A crossover of Harry Potter and Percy Jackson!

Disclaimer: I don't own any of Rowling or Riordan's characters and I'm making nothing from this.

Chapter 1: The Hogwarts Letter

Petunia Evans, demigod daughter of Hecate, glared at the grinning face of Michael Willows, son of Hermes. She knew that he was up to something, they all were. When she got up she grabbed her things and went into the bathroom to shower. Several minutes later a scream came from her throat and she saw that her blonde hair had turned yellow. She bolted out, butt naked, and turned Michael into a pillow.

"It's not that bad," Lily said.

Petunia grumbled.

The three of them were enjoying Camp Half-blood. None of the campers bothered Severus since Hades had claimed him. But Chiron warned him not to go near the Empire State Building. They had visited Narcissa and Petunia told her what Dumbledore had said.

"I don't care about the Black fortune," she said, "I'm having fun with my husband and I'm trying to stay off my feet."

"So where did you go?" Lily asked and Narcissa told her all about the different countries that she had been to with her husband.

She was careful to stay away from England.

"I'm glad that you're happy," Severus said.

"Thanks," Narcissa said to him.

Petunia made sure that Lily had her dose of Wolfbane and she was placed in the basement of The Big House to change back. In August the Hogwarts letters arrived for them and Petunia noticed that hers was heavy. Not thinking of it she opened her letter and something fell out. It was a badge! A snake with the letter 'P' on it. She stared at it and Severus was the first to notice.

"You're a Prefect," he said.

Great!

Dear Miss Evans,

I'm most pleased to announce that you've been made Prefect for Slytherin House. You're to report to the head compartment upon arriving on the Hogwarts Express to get instructions from the Head Boy and Girl on what your duties are and what is expected of you.

Sincerely,

Professor Albus Dumbledore,

Headmaster

Petunia gave the badge to Lily for safe keeping.

"I can't believe that you were made Prefect," Lily said, shocked.

"Yeah, must be your winning personality," Severus said and Petunia hit him.

"Well I'm glad that you got it instead of that Mindy Wolfbane. She's such a snob!"

"Thanks," Petunia said, "But I'm going to have to put up with Peeves."

"Really feel bad for you," Severus told her.

"Thanks," Petunia repeated.

None of the other campers understood why making Prefect was so important. They didn't go to schools that had Prefects or Head Boy's and Girl's. Petunia loathed the fact that she was Prefect. Yes, she could give detention to Regulus if he was an idiot, but she had a ton of duties to do, along with surviving her fifth year and helping students out with their work. It was going to be one long fifth year.

The three of them went to Salem to get their things. They might mainly cater to those that went to Ilvermorny but they did have the books that they needed. For Petunia this year would determine what classes she would take for her final two years. For Lily, Severus, and Remus it would be another year.

"Do you think this year will be as exciting as last?" Lily asked, talking about the final Horcrux being destroyed and Tom Riddle being thrown into Tarterus.

"Dear gods, Lily, I don't think I could stand another 'exciting year.'"

"I'm going to agree," Severus said.

The three of them left Camp Half-Blood, and the States three weeks before term was to begin. Severus paid for three weeks at the Leaky Cauldron and Lily and Petunia headed back home. It was when they saw the moving truck did they realize that something had happened.