The Heir of Voldemort (Harry Potter and Percy Jackson)

The Meeting Demigods POV

Percy and Annabeth were having a picnic when three teenagers just appeared out of nowhere. There were two boys and one girl. "Hermione how is that spell coming?" Asked one of the boy's. He had black hair and a scar on his forehead, shaped a little like a lightning bolt, the other boy had bright red hair and was tripping over his jeans, because they were obviously way to big for him. The girl ,who must have been Hermione, had bushy hair and buck teeth, she seemed to be the smart one of the group. "Almost figured it out, Harry,"
They didn't seem to notice that they ran into Percy and Annabeth's picnic. Percy couldn't take it anymore. "Um.... hello!" He shouted. Hermione looked down and looked as if she was about to start crying. "I am so sorry!" She said. "Pay no attention to anything we were saying," she explained "Harry, Ron we should get going," she explained they started to run away when Annabeth yelled " Wait its ok you must be fighting a monster!" And when that didn't work "That happens to us everyday," that got their attention. "Annabeth" Percy urged, she didn't listen "I'm Annabeth and this is Percy," the boy' s (who must have been Ron) face lit up. "That's my brothers name!" He said excitedly. "I bet it's not Persus," Percy complained in a whisper. Annabeth kicked his shin. She gave him a stop being rude look. Percy didn't care he was mad. Three random British teenagers waltz into their date, the first one they had in months!
"We where fighting a bunch of rouge centaurs and uh, oh..." Hermione tried explaining "Here they come," she finished. Percy drew RipTide, his sword and Annabeth drew her knife. The teens looked surprised, but quickly jumped into action. They drew, pieces of wood? That's what it looked like. "How do you guys plan on protecting yourselves with pieces of wood!?!" Percy shouted and then a bolt of light struck out of Hermione's stick and blasted a centaur into dust. "Guys these centaurs are different. They're evaporating into dust," Hermione explained confused. "You're centaurs don't usually turn to dust?" Annabeth asked. Hermione shook her head no. These people where not like them, they where not Demi-Gods. "Wait," Annabeth started "Your not Demi-Gods are you?" The three gave her a confused. "A Demi-What?" Asked Ron. "Demi-Gods. Half god or goddess, half human," Percy explained. Then Annabeth realized something.
"You're wizards!" Annabeth said. Hermione made a face "And a witch," then she pulled something out of her bag. It was a book "You're Harry Potter," she was amazed. Percy was very confused. "And you're Hermione Granger!" She said pointing to the girl and almost dropped her book. "How do you know about us?" Hermione asked. She held up her book. It was titled Demi-Gods and other Mythical beings. "Chiron gave it to me," she said. The others looked confused, so did Percy.
Then Annabeth started explaining. "Percy, they are kind of like us. They need to stay secret too. They are like children of Hecate, they have magic powers and they are born with them. But they don't have to have wizard blood running through their body. They can be born to complete mortals," at this comment Hermione looked offended. She held it in very well.
"Does that book really tell that much?" Hermione asked. "Yes," Annabeth said delighted. "Okay," Harry started "You seem to know a lot about us and we know nothing about you. Please explain,"