Title: Snape's Demigod Daughter

Rating: T

Summary: Cassandra Snape comes to Hogwarts during Harry's third year. She's different from other students right from the start. And she has a very nasty view of the word 'Muggle.' To make things even stranger, for Harry, she's Petunia Dursley's sister and brings her sister along for the ride. 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 7

Time moved very fast and before long September was over and October started. She continued to train Harry with his sword and it was safe to say that he was a lot better than he had been when he first started. He was also getting better at defeating her in wrestling. It was safe to say that Harry would be fine from now on.

"I'm going to be happy when winter comes," she told Petunia.

"I'm going to agree with that," she said. "Are you heading back to camp when term ends?"

"Yes, I am," she said. "I don't think that I can stand a summer around idiots. So what are you going to do?"

"Going back to Privet Drive," she answered.

"Does your family miss you?" Cassandra asked her.

"Of course they do," Petunia answered. "Are you staying with Severus?"

"Naturally, if he wants me," Cassandra told her.

Petunia gave her a look and said, "He would be born stupid not to accept you. Heavens knows he knows what it's like to be hated for being different."

"Grandfather," she figured and Petunia nodded.

News that Sirius Black had been sighted was all over Hogwarts. Personally Cassandra didn't understand how an escape convict had managed to mess up and get caught. She could feel more protective wards being placed around the school and Dumbledore had to go out and talk to the Dementors.

"I hate them," Cassandra snarled.

"I know," Petunia said.

She continued to train Harry and it got to the point that he was finally able to defeat her in both swords and boxing. She said the line that she was sure that Harry was waiting for her to say, "You don't need any more training. Though, do come to Camp."

And she left Harry alone.

11111111111111111111111111111111111111111111111111111111111111111111111111111111111

"I don't have to train," Harry told Hermione and Ron.

"So we don't have to see you get beaten up," Ron remarked.

"Ron, she didn't 'beat me up,'" he said, "Though she said that I should go to camp."

"I wouldn't," he said.

"At least it would be better than the Dursley's," Harry reasoned.

"Wait a minute; you think this camp would be better than the Dursley's."

Harry looked at him and said, "Anything is better than the Dursley's."

"But do you want to go?" Hermione asked.

"Yes, I think that I do."

111111111111111111111111111111111111111111111111111111111111111111111111111111111111

Snape almost cursed as Petunia suddenly appeared. He almost dropped the goblet full of Wolfbane Potion and glared at the woman that he now knew to be magical. She snickered and asked, "Oh did I make you drop something?"

"This happens to be for Lupin," he told her.

"Oh the werewolf," she said, and then laughed.

"What do you want?" Snape asked, wanting to get rid of her.

"Well Cassandra wants to stay with you during the summer," she said, "And the rules are clear that she has to stay with her mortal father."

"I don't know how to be one."

"Well I know that you'll do fine," she said, "Anyway, you know what it's like to be hated for being different and I'm not talking about what I did."

"I hope you didn't mention my father."

"She figured it out," Petunia said.

"Great," he muttered. "Now, I need to get this potion to him."

"Oh okay," she said and she was gone.

"I hate that woman," he said and he went to give the potion to Lupin.

111111111111111111111111111111111111111111111111111111111111111111111111111111111111

A/N: Sorry about this being a short chapter. I realized that I hadn't updated in a year and wanted to give you all a chapter. I'll be working on this more often.